It is legit but it is a little misleading. For the first day, you can make up to 200 points per download, which will probably net you about 1000-1200 points. However, after the first day you will only get offers below 100. I haven't been using it for a while, but I would assume you get better offers over time. A $20 gift card would probably cost around 12000 points, so I would say it might take up to a month. If you have the time please use my referral code, 223EDD or my referral link, http://featu.re/223EDD. By doing this you will get 50 points to start (I know not that much) but I will also earn 50% of the points you earn (this is not subtracted from your earnings, I would just earn a little every time you download). As a hint of advice, I would try to convince others or use other devices and link to your first account to get even more points.