Usuaia is the platform you're using right now 🤘.
We're publishers like you and we build it to help you publishers evolve and support your product with the best of prices: 0$ / month. Yep, it's totally free.
Currently, we have a help desk, public pages, a forum, an issues module and a blog for your product. And we're working on making it better, so if you have a suggestion, post it on our forums!