Considering that riot put up 100,000 for a SR tourny, I imagine they have plans for larger cash pools. Keep in mind riot is much younger than valve which translates to more funds going towards company development. Besides, riot is catering to casual gamers, people who generally view these tournies solely as entertainment. At the end of the day, people will support the game for its gameplay, not cash pool.
I took the liberty of adding another copy of this with no punctuation for the OP.
Considering that riot put up 100,000 for a SR tourny I imagine they have plans for larger cash pools keep in mind riot is much younger than valve which translates to more funds going towards company development besides riot is catering to casual gamers people who generally view these tournies solely as entertainment at the end of the day people will support the game for its gameplay not cash pool