Two lessons you need to learn to stay safe:
1) Some reputable, trustworthy escorts do indeed link their OF on their escort ads. But they will always, always, always say something like "DO NOT MENTION MEET-UPS ON OF!!!" because OnlyFans has an explicit rule against that. It's an offence that can get you banned from the platform. They'll have another form of contact to book an escort appointment, like phone number, email, website, etc.
2) If an escort ad says
"message me on OF!!" then it is 100% a scam. Their plan is to get you to sign up to OF, at which point they have your money, then you'll message them on OF (sometimes requiring an additional fee), then when you mention a meet-up you'll get banned from the website for violating the Terms Of Service you agreed to (you read it, right? lol) and they'll still have your money, laughing all the way to the bank.
(Copied the above from another post I made about this topic.)
Cheers
No number displayed, just the OF link offering 30 day free. Has anyone been before?