[Crono]

Gunbound had a "pay to win" model and what happened? GB NA and GB EU shutdown, while the international version is ridden with unbalance and a dwindling playercount.

HoN went for a "pay for aesthetics" model where you can buy custom announcer packs, hero skins, etc, and guess what? It's going great. I believe LoL has the same system and that hit over a million players.

Both games are free to play, but it's impossible to do good on Gunbound without spending money. You could download hacks and you'll still lose because it's that unbalanced. No system should ever give players an advantage by spending money.