
There is nothing wrong with paying for booth space.
A good event can absolutely be worth the fee.
But booth space and marketing are not automatically the same product.
If the organizer gives you a marked space, a date and a crowd, then you bought event access.
If they also market your business before the event, create a vendor profile, promote your products, connect your inventory to search, give you a QR code, track customer activity and provide a report afterward, then you bought something closer to an actual marketing service.
Before the event, people should be able to discover you.
During the event, people should be able to find you.
After the event, they should still be able to buy from you, follow you or contact you.
Otherwise every market starts over from zero next weekend.