OnlyFans is operated by Fenix International Limited based in London, United Kingdom. They have been around since 2016 and gained massive popularity in 2018 when Leonid Radvinsky - the owner of MyFreeCams - bought 75% of the company.
Explicit pornographic content is allowed to be posted but not mandatory. OnlyFans is popular around fitness models and musicians aswell. Their main portion of content creators seems to be posting adult content though.
It's free to subscribe to your profile by default, you can set the price to up to 50 USD per month. Free profiles can still charge their subscribers by offering locked content, that needs to be paid for. This can be individual photos or photo sets, aswell as videos. The price for this locked content also has a maximum of 50 USD per post. If you decided on a monthly subscription fee, you can give discounts aswell. There are promotions for new signups, prepaid packages for users signing up for multiple months in advance and you can create trial links aswell giving users between 1 day or 30 days for free. Subscribers can also send a tip under every post, on your profile page or through direct messages.
Earnings can be paid out after 7 days with a minimum withdrawal of 20 USD. It usually takes 3-5 business days for your payout to be processed. Payment methods vary depending on your country. Withdrawals can be done manually or automatically every day, every week or every month.
OnlyFans is widely accepted, influencers from Instagram or Tik Tok and even celebrities use it to market their content.