I always took the selling rule as being something like where the mod would be unavailable unless if you paid a fee to access it. This isn't the case, as it seems like the only difference is the rate in which he releases material. The issue I have with this is where the money is going to. Obviously it's not going to any modding tools because they are free to use. Also we only have the ability to enforce KotOR, not any of the other games above listed on his Patreon.
Even if the only thing being sold is "becoming a Patron," linking his Patreon to his mod is technically an advertisement.