I once tried hugging face because I wanted I worked through some tutorial. They wanted my credit card details during the registration as far as I remember. After a month they invoiced me some amount of money and I had no idea what it was. To be honest, I don't understand what exactly they do and what services I was paying for, but I cancelled my account and never touched it again. For me that was a totally intransparent process.

Their pricing seems pretty transparent: https://huggingface.co/pricing