Essentially the addon currently syncs users from XenForo to a third-party application called SourceBans++. You can read more about that addon here: https://sbpp.sarabveer.me/
I have a handful of features I'd like to add, nothing crazy and also do a sanity check on the code to ensure it's optimal. Give me a PM here if you're interested with an idea of pricing. Budget is very small, not looking for anything crazy, so if it's over $150 USD then I won't be interested. Thanks for your time!