sorry have to respond here, more people playing will make riot more money since in theory they will all buy skins or spend money to get the characters they want. however once those players have those skins and characters they dont spend more money. which means they still need more players. on the flip side of that more GAMES =/= more money. it equals a higher strain on the servers and then in turn more lag time, longer load times, longer log in ques ect. this hurts the game. riot spends money on upgrading servers to accommodate more players.
in the long run making money is determined by how many players they can bring in not how many games they are playing, at least not at the ranked level. by the time your ranked you can assume that most people will have spent the money on characters their good with and the skins they want for them. now if riot was making a way for players at lower levels to play more games say in the normal matches such as removing toxic players from the community (the likely reason your post on their financial state that no one ever saw was removed)then it would mean more players reaching enough involvement with the game to want to spend money.
see in reality the only time ranked players matter in terms of making money is when they release new content that the ranked players want to spend money on. and has no bearing on how many games a ranked player plays.