From their FAQ:

Is there some way I can force Elon Musk to pay $47 to Cards Against Humanity PAC?

Funny you should ask! If you’re a registered voter in PA, GA, NV, AZ, NC, WI, or MI, just type your name into this dumb website for his PAC, put “MuskIsDumb@cah.lol” as your referrer, and they’ll be legally obligated to pay us $47. The more people who do this, the more Musk money we’ll get to un-fuck America.

If he doesn’t pay up, we’ll sue him again.