How do you thing about earning money from internet... Is it reliable?

Some websites aren't reliable, while some are. As you said, only 50% of the websites out there are really reliable, only half pay. I was scammed once, and I learned how not to be scammed. It's simple: ask other people if the website really pays out. On SurfJunky, I couldn't contact anybody, since there wasn't a list of members. This way, I couldn't know if it was reliable or not, and I got scammed. Here in MyLot, I asked others, and they showed me the proof of payment. I got payed once, now. Also, try to join low payout websites, this way it's easier to know if they pay or not: once you reach the minimum payout, just try to withdraw it.