Is Duluth unfriendly to posters?

I’m old school and used posters to promote an event. I’ve noticed a numerous amount of posters for my upcoming Minerva Zine Party have gone missing or were stolen from sites like Pizza Luce, Carmody, Sir Ben’s. I used multiple tacts and tape to secure them. More Duluth locations require you have the managers approval and are not posted timely. It’s extremely frustrating and expensive for a DIY zine publisher. Any tips, ideas to take out poster thefts, or solutions are appreciated!