This place is getting some bot account promoting various stupid adverts.

This one is promoting buying google reviews
https://protonmail.uservoice.com/forums/284483-proton-mail/suggestions/49060196-buy-google-reviews

This one is for a children dentist
https://protonmail.uservoice.com/forums/284483-proton-mail/suggestions/49053983-the-benefits-of-pediatric-dentistry-why-your-chil

It should be cleaned up fast and checked at LEAST weekly if you want to look serious about User feedback. Some of those have been here for +20 days.