I live on the east side of Washington state, so we don't have access to the big fairs and events on the west side of the state. 

However, an author who lives over there does a lot of paperback sales at those events. Another travels around to fairs from the west side into Montana (and probably beyond) because he specializes in a certain type of fantasy and loves to "talk shop" with everyone.

Crowdfunding can be a great way to sell paperbacks...especially special editions. I don't write the type of books that do amazingly well there, but some fantasy authors are making tens of thousands in gross sales.  I don't know if they earn much of a profit after it's all done with the add-ons and extras, but it's worth taking a look if that's something that appeals.

I think I'm going to take a dive into staring a TikTok channel this week. I have two videos I can add--one is a trailer and the other chronicles an upcoming book cover. I can't add content regularly, but I can make a presence. I'm gonna take a look today...

Sorry, but all the anecdotal evidence I have is that hand selling at fairs produces the most paperback fiction sales, unless you are an author with the kind of following that wants a fancy edition and autographing. At this time of year, perhaps ads pushing the paperbacks as gifts might move some.

Paperback marketing is tricky because paperback buyers tend to be much more likely to prefer trad books to indie ones, at least in my experience. Advertising the book in other ways will probably cause a small number of paperback sales if someone comes along who is open to indie but prefers paperback. Most of my paperback sales are in my two titles that are closest to lit fic (because the lit fic crowd also seems to be more paper-oriented).

Last month, I did try including the paperbacks in one of my AMS ads (the one with the two lit ficish books). I saw a small increase, and the ACOS improved--but it still wasn't yielding a positive ROI, so I can't really recommend it.

There are a few authors who do that, as I see them on Facebook as Reels.

I'm not sure it works unless what you're doing is quirky. Even then, I'm not sure it sells books.