Just took a look, it's not possible to add new merchants myself, right? So what's the procedure for that?
Discussion
I can make you an admin if you’re keen to help manage the merchants list
But we’re mainly interested in bitcoin related merchants
I'd add a few, like Xapo Bank, Bringin, Peach Bitcoin, Mt Pelerin, Revolut, Kraken Pro (has different referral link than Kraken) and Krak, and remove Primal (doesn't have a referral program, does it?), though I'd rather not be an admin but provide the fitting referral links only. 😉