What do you use to block datacenters? I help admin a forum and over 95 percent of new members is from that.
I do this as well, how I do it is you grab the ASN, and look it up here: https://mxtoolbox.com/asn.aspx
It reveals all the IP sets.
Then, I open an existing XML file that I previously converted the IP sets into. You can do this by banning a few IPs temporarily, and exporting it, you'll get the XML file and formatting it uses.
It's a bit of work, but I can do it fairly fast now. Using it with Excel to mass replicate the data, search & replace with Notepad++, I'm able to generate a new XML with the IPs to ban, then I just import it to the Xenforo's IP Ban.
Your way of IP banning is wrong. IP Banning VPNs, data centers, etc is fine, but legitimate IP ranges? We have tons of users that are in the same IP range because they use the same Internet & Mobile services. The way you're banning, you're likely blocking legitimate users from even being able to register.Ignore list doesn't work well on this software as the person you're ignoring can still comment on your posts.
Banning and deleting is more effective.
But you know, you do it your way, and you only have 3 members. Everyone else has tens of thousands, so we'll stick to our way. The Ignore List works.