Too complicated, yet another bunch of websites to register at. What works for me:

- Consulting. You need clear message what you offer and how you can help. Also clear way how consulting process works. Companies are happy to pay extra, if they get author.

- Paypal donations, put 'Donate!' button on website, prefil some amount and offer recuring payments. Paypal even handles credit card.

- Crypto coin donations. Setup wallets and put addresses on web.

- T-Shirts or books for premium price.