Seems like Cow still wants money and mods had enough of him and blacklisted his discord tag haha
I created an alternative to Veterans Only called No Dupe Account (NDA): https://forums.alliedmods.net/showthread.php?t=330779
While its main focus is to prevent duplicate accounts from joining the server, you can customize is as you want with the given features/cvars
SteamDB doesn't seem to have an API, and I don't really know a simple and efficient way to calculate someone's account value. If I find a way though, and if I have some free time, I could push an update to my plugin to add this feature!