Looking through the licensing, I find myself in a hodgepodge situation. We host several hundred domains, something that 'could' be done on one server, but we prefer to run multiple servers for many reasons. I was considering an unlimited license, but then discovered that was a 'one server' license.
So, maybe we are a bit strange here? But what would fit us better would be a 500 domain license on multiple servers or something to that effect.
I guess it could be said like this. An eight processor newest xeon machine loaded to the gills... one of those $80,000 servers can easily handle thousands of domains (under one Virualmin license).. For us, it would require all different sizes of licenses which just wouldn't be much fun to keep up with and would ultimately cost a good bit more for far fewer domains.
My sincere thanks for all you have done!