Loki fucked Jeff Goldblum.
I want to believe he promised a great deal but ultimately never delivered. Because well. You lose your leverage that way. I guess. Yes.
I got not problem with the “Loki Fucked the Grandmaster” headcanons because MCU Loki is a dumpster fire and nothing is off the table but let’s be honest, it’s far more probable that he simply did some illusions and low-level magic and the Grandmaster was like a delighted three year old and started taking him everywhere just so he could show people this cool new toy that turned cups into snakes and make duplicates of itself.
This is equally delightful