@Tyropaen are these all fresh accounts? What skills are you botting on them? Are you doing anything else on them besides bot?
It's really hard to objectively judge "ban risk", but anecdotally I get the impression that jagex has indeed cracked down on quicker bans for new/fresh accounts, and accounts which have been inactive for a long time & then go right back to botting.
But I've still seen a lot of situations where people will still get away with botting for a long time on built-up/main/semi-main accounts.
It seems like, if an account lives past a certain threshold and is being actively played it can last a LOT longer than accounts which are new/inactive/purely botted. So here you might be falling into the trap of: getting account(s) banned, making a new account & botting it right away and then getting banned because it's new & repeat. I fell into this trap a few months ago as well.
I mean the above was always kind of the case by my understanding, it just seems a bit more prevalent now.