I am using it too and like it. Solid and does work very well since the latest versions. However: I would not sign this:For anyone who wants to stop all proxies, without issue or further concern: https://xenforo.com/community/resources/xtr-ip-threat-monitor.10134/
By default it misses most of the resident proxies. It does catch data center based stuff to a high degree. To block resident proxies you have to block ASNs or countries with all the colateral damage that this may cause.blocking all proxies and VPN's that are nasty
Also, it get's the data what to block from the proxycheck.io API and to use this does cost money (free up to 1000 queries/day, but even my small forum has more that that). The amount of queries depends a bit from the settings of the add on, however, if you want to block ASNs you have to query every IP.
While I really like the add on there are some things that I would like to see, especially better analytics. Lets hope that development continues as fast as it was in the past.