Yes, they just don’t release every game they work on, or sit on them for longer than most because their finances are no longer dependent on the games they make themselves
Personal i think the criteria for no longer being an indie dev is if the company is funded by a publisher or the company itself has been or has the capacity to be a publisher themselves
I think because RWS were kind of similar. Before Postal they just made a few educational games like Sesame Street etc. They probably felt they were giving a studio that was in a similar position to them the same kind of chance they got.
It might not be what they planned but they’re now using it as an opportunity for more publicity to get something out of it especially now there are some potential sales they won’t be getting anymore.