Just give me a notice before I buy, "Warning! This game is in early access and hasn't been updated in X amount of time. It may be abandoned."

If they're going to do anything else, block sales to the game after a certain period of inactivity and notify the dev to either update the game, delist, or make the game free.

That way the game isn't lost to time, people aren't getting scammed, and it places some accountability on the dev if they want to continue their project.