They can and will. Mark my words, the dev will dump and kill this coin. I have 4x R9 290s, 1 280x, and 2x 270s churning on this full time and I got 5 coins in 36 hours. This is why premine doesn't work -- it fundamentally fucks the value of the coin so that it's not longer tied to the amount of energy required to create it.
Pretty sure thats just a small part of a days work... Check again on you payout today. Should be significantly better. As for your faith in the dev's and shareholders.. That's something for everyone to decide for themselfs.