Actually, you'll probably find many abandoned games are for that exact reason, they go in to it for the wrong reasons, trying to get rich quick, and for most it doesn't turn out that way.
Alternatively, they make a game, it doesn't do well, so they abandon it to make another one, hoping that one will be successful, but they don't seem to realise that doing so just makes people not have any faith in the developer for it, so that one doesn't do well either.
If developers have a track record of abandoning games, it is completely understandable that people won't even give any of their future games a second look, and I don't blame them at all.