I find games like this utterly vapid and without any appeal whatsoever. I wonder if there's a name for the condition in which you are psychologically immune to these games, for whatever reason. I'm thankful I have it.
I played Upgrade Complete until the abrupt ending. I found I felt annoyed that the game was over, and asked myself why. I realized all the playing of the game I had just done was pointless number-increasing – I think conveying that message is the point of Upgrade Complete. That inspired me avoid games with too much grinding and not enough more interesting parts like puzzles or story, and to use cheats whenever possible to skip the grinding.
The really amusing bit to me is that not only are they bald-facedly mocking this addiction-oriented gameplay, they are simultaneously self-referentially some of the most fun games in that genre.