@John_Mary1 I'm honestly not sure. I've read that leaving 1* means they won't be able to IB at all with anyone, but I don't know for sure. And I don't know if a guest has some recommendations, but some that say they wouldn't host again, if that guest can still book with other hosts.
I have never used IB, so hopefully a host who does can clarify here.
BTW, hosts who don't use IB can't see guest star ratings, we only have written reviews to go on, so please don't leave low stars and then a written review that sounds like the guest was fine.