MegaTypers claims to be one of the top Captcha work provider. Despite the fact that they claim too much, MegaTypers is free to join.
On the website, MegaTypers also claims that most of their experienced & top typers earn between $100 to $250 per month.
Beginners can earn $0.45 per 1000 word images typed & experienced people earn $1.5 per 1000 word images typed.
They pay through Debit Cards, Bank Checks, PayPal, WebMoney, Perfect Money, Payza and Western Union. You need an invitation code to signup this.