Although location pinball is not happening right now, there are some spots you can use multiplayer games on location to get GCs. Cayle’s post about using them to help maximize JM scores this way reminded me of this.
Basically, you use multiplayer games to set yourself up for big scores. Earlier player balls you play yourself set up the final player (still you) with great opportunities. It’ll cost you a few extra bucks, but it’s worth it! And is it ethical? You paid for the games, so it’s fine; both you and the operators win! You can do this at home too to maximize your personal bests. Some examples are:
Setting up stealable locks with players 1, 2 and/or 3, like on TNA (lock two balls for the last player for every ball), Wonka (Wonkavator locks), and a good number of solid state games.
Increasing the number of balls you’ll get in a multiball, especially on Aerosmith; put five balls in the toy box. GOTG Groot locks too (for one more ball).
Setting up progressive awards, like on BK2K (RANSOM letters) and Time Machine (STARWARP letters).
Building up progressive jackpots like on Taxi, Cyclone, Police Force, and Bad Cats. Have at it if you can find a 24 with old nuke code too! Doing this may take you a lot of games to get the max jackpot values sometimes.
Super deep cut that I like a lot:
Get a 3-ball quick multiball on WW by locking 2 balls and then starting quick multiball with the final player.
There are likely many other similar exploits like this. Be creative and you’ll find them and be GC!