Just as you described, bittube system is not the best because it can be easily gamed, with dtube that video you described would not receive any reward, dtube + dlive reward quality while bittube in the meantime, is rewarding content designed to abuse its system.
I think dtube and dlive are better.
I think you are right. Even though I love their interface, their system is too easy to manipulate. @ura-soul has clarified an important point above (and I have adjusted the article accordingly) but while there are still any kind of reward for watching the films, it's pretty clear what is going to happen.