That seems to be part of the $4 / mo / user subscription. A server to self-host costs $100-$500 / mo, so it doesn't seem like an impossible obstacle with < 100

That seems to be part of the $4 / mo / user subscription. A server to self-host costs $100-$500 / mo, so it doesn't seem like an impossible obstacle with < 100 users. What fee structure would work for you? Maybe per-installation or per-repo?