It would be cool to have a premium/safe bot to use.
Just because its premium it does not at all mean that it is safe. Just because its free it does not mean that it is unsafe. If I remember right there are still no proper standards for premium bots (anyone correct me if I'm wrong, I've been inactive) so any bot, good or bad, safe or unsafe could be premium. Either way, all bots on RuneMate will be relatively safe because of the way RuneMate works. If you get banned while using the bot (assuming the bot works properly/isn't broken), it is probably due to your own botting hours and some other factors that do not have to do with the bot. I'm just trying to let you know that on RuneMate you don't need to pay money for a safe bot.
TL;DR - There are safe non-premium bots. Just because its premium it doesn't mean its safe.