See, this is the sort of “Games as Service” strategy that I really enjoy:

• They sell some new content to fund free updates
• They maintain build states in Steam that allow you to revert to previous versions if a change they make upsets you (or breaks the game outright)
• They release a lot of free updates that massively change how the game plays, even if you’ll get more out of it if you keep paying in
• Direct sales only

It also helps that it’s a less intensely visual game and a more niche title, so there’s less pressure to make 10 million sales or whatever...