I play guild wars 2 and it has a "spend real money to get in game money" system, although it's probably one of the least predatory ones I've encountered. I don't really think it's a big deal, or at least it's nowhere near that of a gacha game (in fact I think they actually cap the amount you can buy per month to prevent people from going nuts and bankrupting themselves).
IMO I don't think you're contributing to exploitation by playing something like that unless you're involved in one of those blockchain games that have digital landlords lol