In many similar communities there is too much advertising and not enough value to even spend time on. I think it's hard to find answers to your questions there.
Of course, among next communities there are such posts too, but I also found topics to think on, not money-obsessed motivation and interesting insights there:
r/SaaS
r/SideProject
r/Enterpreneur
r/startups
r/business
r/GrowthHacking
r/SEO
r/SocialMediaMarketing
r/content_marketing
+ r/webdev for developers.
What would you add?
Humva