contact a Onlyfans creator that never spams her promos , and normally never sells promos, but thats in the 0.01%
make sure she's in the similar nice as your model, offer the creator to promote your creator on her feed, in a mass dm, and tp pin the post on her feed, and if possible post you creators name in her bio.
on the feed and mass dm promo post , make sure the caption includes a good offer,
she can say: sub to my friend she offers free dickratings and a free video if you tell her i sent you, or if you subscribe today.
you can make a deal and ask her to keep doing this untill you have a certain number of subs. or for a period of time, 72 hrs ( for example )
Make sure the content she uses in the promo is incredible, what works for us is full nude with her face and pussy shown.
with the right creator doing the promo , you could potentially get hundreds of paid subs, we usually set the first month discounted so teh barrier of entry isnt so high, a dickrating and a video for $3 from an atractive looking creator is a good deal for a thirsty simp.
Another option is the following : find a freelancer who offer guaranteeds OF subs from twitter traffic, reddit traffic, these are normally free trial link subscribers.
with both methods you need experienced chatters to milk the incoming subs, and some creators have an automated locked welcome mesage to try to break even on the promo investment right away.