Yeah I'm sure a company like Buffer could be willing to share that information (like they already do for their revenue on the Baremetrics "open startups" page)

Yeah I'm sure a company like Buffer could be willing to share that information (like they already do for their revenue on the Baremetrics "open startups" page) I agree employees (and past employees) could offer valuable information, although they're probably legally bound by some confidentiality agreements... However I think when you're in a market it's easier to estimate how your competitors are doing, even though you don't have any privileged info.