Don't quote me on the exact numbers because it's been a long time.
There was that one time EuRO went a bit crazy and started reaching out to all private servers and asking them to shut down or face a lawsuit. I believe their threat was 100k fee and 10 years in jail.
The thread is still probably somewhere in the RMS archives since some people were seriously concerned. I was one of those people.
I didn't really wanna shut down my server and bend over for them so at the time I had my team start digging. EuRO was actually private server at first. They were FranceRO or some crap, and they bought the rights to France fro Gravity for a pretty nice number, something like 100k USD. I think slightly more, then after a few months they gave an additional 150k to the rights to market to Europe, and voila EuRO was born.
Again this is all from memory and their contract with Gravity is available in the public records. We took days reading through their contract and trying to figure out a way out of this. In the end we realized that they could only target servers in Europe and they were breaching iRO contract since we hosted in USA. So we kindly asked them to fck off and if they contacted us again that we would be the ones taking them to court.
To our belief it actually worked. It was one of their marketing people trying to bring in new players from private servers. They offered "community helper" position to any server admins that merged their servers.
So to get back to the original question. Gravity has poked at the private server community every once in a while. I just don't understand why they haven't continued to do so. There is amazing money out there for them to make from private servers. Some of the older and bigger servers can directly compete with some of their official servers so I believe they are missing out.