You could sell his organs

Uhhh...wasn't sure if this was a serious question or not, but like a few others suggested, maybe you could offer to participate somehow. Do they have a social media/promotions team? I used to do that in the early '00s.

Offer him any valuable services you possibly could provide to support them. But it will still feel creepy even if you could offer something serious. Do not do the: May I carry the microphone for you - thing!

🤷

Sell embarrassing photo's or stories to the press if he doesn't hook you up with backstage passes and selfie opportunities.

You should not.