I've been using Inbox Dollars for almost five years. In that time, I haven't made NEARLY the same as I have made in just over a year on Fusion Cash; but Inbox IS legit. I rarely do their surveys and I no longer get the daily emails (not sure why). I mostly just do occasional searches and my balance grows slowly over time. I then always go on a survey binge over there once I hit the minimum $30 cash out mark because they always run a deal where if you earn an extra $10 over one month they then waive the $3 processing fee they charge for cash outs. In fact, I am in the home stretch RIGHT NOW for one of those $10 survey binges. Most of their surveys are only 25 - 50¢ and they are usually tough to qualify for - which is why I don't normally put in the effort. My time is better spent at FC!
Earlier today I was doing a simple survey at Inbox which would have put me over the top of my additional $10 goal. I got to the end and was denied payment for rushing through. I'll admit I was excited at the prospect of being done with my binge, but the entire survey was very simple and easy to read and answer. *I* know that all of my answers were legitimately and truthfully given and that I read all of the questions and multiple choice responses, but I guess finishing a 10 minute survey in 8 minutes was flagged.
All in all Inbox is worth a cash out about every 15 - 18 months for me. Hardly seems worth it, but it IS slow and STEADY earning with absolute minimal effort...