IMO, paying for characters is at least bordering close to pay-to-win, but skins are more or less donations. I like SMITE's way of handling this: you can either

IMO, paying for characters is at least bordering close to pay-to-win, but skins are more or less donations. I like SMITE's way of handling this: you can either buy/grind for gods individually, or you can pay $30 to get all gods immediately. After that, the only remaining microtransactions are pure cosmetics, like skins.