These are the fans that really want to get your attention and they are doing so in a public way.
They might not be extroverts and this might be the easiest way for them to write back and show you affection.
Making specific promotion videos can also help you because the potential buyer can hear your voice and see how you are beyond just a photo.
Imagine for a small monthly fee you have people working for you every single day promoting you and growing your account.
Reddit is a great platform you can use to promote your OnlyFans.
Start finding other people with only fans, or nice social media profiles and beg them for shout outs.