Exciting idea. The #Wobbly app seems useful for a variety of contexts where grassroots self-organization and networking is important. The idea of a platform that facilitates simultaneously striking and operating a cooperative is great. (Reminds me of the 1919 general strike in Seattle, WA.)
social.coop is a cooperatively-run corner of the Fediverse. The instance is democratically governed by its members, who generally share an interest in the co-op model, but topics of discussion range widely.
Our instance is supported by sliding scale contributions of $1-10/mo made via Open Collective. You must have an active Open Collective account to apply for membership; you may set one up here