User @soraya@lemmy.world (Soraya Pepe) is advertising a forum service as well as a booking site where you can order donuts* that they’ll deliver to your hotel room. They are using bit.ly links to obscure links to their forum topics in community sidebars as well. These communities are !free@lemmy.world and !woman@lemmy.world.
Donuts*
Probably not donuts.
Thank you for reporting it! She’s banned now. :)