Undoubtedly, if anything, you'd get the "tHiS iS A bUsIneSS" line of replies to a suggestion like this.
The cold hard reality is that a "freemium" service is looking for specifically those players who spend compulsively and possibly uncontrollably. These are cash cows and the company will not quit milking them for every drop.
I've suggested a "Win This Game" button that costs like 500k GM in the past, so we at least don't have to waste our time. Don't hold your breath for it.
Bail from those games, let those guys play with themselves if they absolutely must, and move on. There is not, has never been and extremely likely will never be any other way to deal with it.
Dear LostRealist: There you go living up to you name. I agree with everything you said.