The problem is not that players are getting payed. Its that Blizzard were not clear about what money actually went to the players. Blizzard sold an in-game item, advertising that 25% of the cost would go to the price pool for WoW E-sports. Instead of that, Blizzard used the 25% to replace their own price pool, so instead of them having to pay for players in the next competion, they had made players cash out 100% of the entire price pool.
Edit: So normally Blizzard would be paying for the price pool, which was 250+k dollars last year, but this year, they instead got the players to pay for it, completly. Blizzard is giving 0 dollars to the competative scene at this years Blizzcon. That is pretty scammy.