VPS, VPN, proxystores, xmrbazaar, shopinbit, esims, giftcards and of course in real life. I ask at every pos if they would accept Monero. Success depends on your personal ties with the merchant. Freelancers are those who agree most easily. The key to success: I don't have a credit or debit card which motivates me to create my personal Monero network. I'd challenge every self proclaimed BTC maxi to do the same. Walk the talk if you want to be taken seriously.