The trick is they pay you like .001 cent for each email. It takes a lot of them emails to make one penny. That is what you have to watch out for. There are a couple of good get paid to read programs, like Inbox Dollars and Send Earnings. Those other ones are nothing but a rip off. One good thing can come out of get paid to read programs and that is advertising your own site. You make so much money or earn so much points and you can turn around and spend that money in advertising your own site.
Be careful with these programs. There are a many of them that don't pay. You almost reach or reach your payout and they vanish into thin air or they just don't pay. So your time is wasted. There are allot more things out there that you can make money doing. Don't waste your time on these get paid to programs.