Although PixProfit is good site but the registration is closed at present. We will inform you if they open the signup again. You can follow the site at pixprofit.com
Its very difficult to work on all the sites simultaneously so you need to check which sites you like the most & work on few of the sites from the list.
Captcha entry will not earn you a great income but there are many other online jobs provided here that can make you more than $40,000 per month. You can read the details & see if you can work on any of this to make more money.