I disagree that multipools are scamming their users, but what I do know is when every miner joins a multipool, mining will be dead.

The whole point of mining profitable is when other users (so called "investors") are buying coins so their value will rise because of the buy orders. Individual miners can decide to hold and sell at a later point, while multipools sell off their coins immediately for BTC. No coin, not BTC/LTC or any other coin can survive daily selloffs without enough investors. SPA included, also AUR, BC or other coins.

So whenever multipools get too big and keep flooding every coin they mine on #exchange, the value will definately never rise and it is only waiting until that specific coin heads on to 1 satoshi.