Clixsense is perhaps one of the oldest Paid to Click site on the internet. It has been around for several years. It was launched in the year 2007. Clixsense is not a scam site. It has been paying its members since all these years. It is one of the most trusted PTC site that I have ever seen. It has a good reputation and positive reviews.
Clixsense is one of the Top Legitimate Paid to Click site. It pays its members to view advertisements and usually most of these
ads are of 30 seconds timer which are worth $ 0.001 to $ 0.02 per click. Clixsense is a 100% free program and you don't need to upgrade your membership to Premium inorder to get paid.
Standard Members are regular members who joins the program for free whereas Premium Members are those members who have upgraded their membership status by paying $14.95. $14.95 is indeed very cheap to upgrade your membership when compared to other PTC websites. This Premium Membership is valid for 1 year from the date of upgradation.

Should you upgrade to Clixsense Premium Membership Account?
Well, that's a very good question. Let me tell you, Premium Members can enjoy lots of benefits than Standard Members. There is a difference between Sign-up Commissions, Downline Clicks, Chances to Win ClixGrid, Number of Ads display and so on. Standard Members can earn only from their direct referral and whenever these direct referrals upgrade their membership, you are instantly paid $2. Whereas, Premium Members can reap the benefit of 8 - Tier Affiliate Program. If someone signs up under your referral link and upgrade his or her membership to Premium, you get sign up commissions and membership upgrade commissions, and if he or she refers another person who also upgrades his or her membership to Premium, you are instantly paid $1 for each upgrade which means you get paid for doing absolutely, nothing! Premium Members earn higher downline clicks from their referred members. They can view more advertisements and earn more in a day. You get 100+ ads to click on Clixsense as soon as you upgrade to Premium Membership but later the number decreases. For more details, you can check this table out :
Advertisements                                    Standard                                                      Premium
Micro                                                      $0.0001                                                       $0.0004
Mini                                                         $0.0012                                                       $0.0025
Standard                                                $0.0025                                                       $0.0050
Extended                                               $0.0050                                                       $0.0100
Commission Per Sign-up                      None                                                        $0.20 after 20 clicks
Commission Per Purchase                   10% upto $1.00                                     $10% upto $2.00
Limit Per Referral                                  $50                                                           $100

Level #1                                                   $2.00                                                       $2.00
Level #2                                                        -                                                           $1
Level #3  -                                                     -                                                           $1
Level #4 -                                                      -                                                           $1
Level #5  -                                                     -                                                           $1
Level #6  -                                                     -                                                           $1
Level #7  -                                                     -                                                           $1
Level #8  -                                                     -                                                           $1

Refer & Earn More :
You can refer, invite your friends, relatives and anybody and earn more from the ads they click, ads they purchase and for the membership upgrade.
Clixsense Toolbar:
The number of ads display depends on certain geographical locations. US residents get to view more advertisements than international members. The best strategy is to install Clixsense Browser Toolbar. This Toolbar instantly notifies you of any available ad clicks. But, remember, you have to be very fast otherwise, the ads expire.
What is ClixGrid?
Clixsense members can also try their luck and win some few cents up to $5 by clicking on a picture grid which is known as "ClixGrid". All you have to do is click on the picture grid and view the sponsor's website for about 10 seconds. Standard members can click 25 times whereas Premium Members gets more clicks and double the chances of winning.
UPDATE ON CLIXGRID: - Clixsense have just updated the ClixGrid game to give you more chances to play, more prizes and new options for advertisers. Free members can now play 30 times per day and Premium members 60 times per day. The top prize has also been increased from $5.00 to $10.00.
Payment Processor & Fees :

Latest News - Lower PayPal Withdrawal Limit:
Clixsense have lowered the PayPal withdrawal amount from $25 to $20 and very soon they are planning to lower it to $10 as well as add another Payment Processor i.e. LIBERTY RESERVE.
Unique Advertising Options for the Advertisers:
Clixsense also offers a very good and an affordable advertising option. It is cost effective and has demographic filter with detailed statistics reports. There is discount for bulk advertising for the advertisers and so much more.
Conclusion: Clixsense is not a "go, get quick rich scheme". It pays its users for clicking and viewing advertisements.
QUICK UPDATE: Clixsense is now processing Cashouts TWO times a week. Your Cashouts will still be done on Monday Afternoon (Eastern Standard Time) and again on Friday afternoon. However, this is for Electronic Cashouts only. Checks will remain monthly!