It is a bad decision, I don't see your point.

It isn't just one bad decision. It's many decisions. Those decisions don't just come out of "thin air" and destroy the company. They're always a series of decisions which eventually topple over the company. Vine not paying their content creators wasn't just the one time; they were likely consciously not paying their content creators over a long period of time.

That is a good point, and I agree.