If you're going for 99s and you're going to bot it, you'd have to be an idiot to keep the account f2p the entire time instead of getting members where its less packed, better xp/training opportunities and variety which will all give your BOTTED account the better chance to not get banned and of course make it to that 99 then in a f2p world where almost every training location has a bot already there or multiple people who will report you.