Probably not setting any records, but since this began as the cliche "I'm gonna make an MMO as my first game! How hard can it be?" getting any sort of meaningful sales at all has been such a confidence boost. Took me 5 years in total including all the prototyping, and the version that finally saw the light of day was 2 years in the making.

Predictably, it was poorly balanced and the server has been sorta crumbling, so I've taken a refund hit based on some server crashes and as you can see from the stats, there was a couple of exploits that were found.

All totally worth it to see a guy named FinGermyass rack up 50 something hours in the first couple of days though, what a hero.

As for the technical side - I used Godot 4.3 mono for both the client and the server, although the server is more of a .NET console app with a Godot UI bolted on top of it rather than an actual game. It's a simple RTS city-builder wargame (meant to be reminiscent of the old browser-based RTS's like Evony and Travian) without any reaction-based mechanics so the net code hasn't had to be super advanced - anything under a couple hundred ping seems to be fine.   
  
I'm pretty much chucking JSON around using TCP which is a lot slower than usual methods (due to the TCP / json serialisation overhead) but has relieved me of writing a lot of manual validation - I know my messages are arriving in order, and I can just wrap the JSON Serialisation in a try / catch and reject the message if it fails.

The MMO I made in Godot has reached 100 players!!