@joli It seems these days you don't really have any better options. #RSS hardly qualifies as an "interactive" feed and only works for following / consuming content (and as far as I see around in my non-technical bubble, few people know what it is, let alone use it). On #Twitter, #Facebook , #fediverse however, you can't really "interact" or "follow" without having an account. I'd clarify the requirements of "social", "interactive", "followable" with the customer.
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