I dont think stacker.news is useful for no-coiners ... from my experience (and leanings) I suggest following these steps:
1- dont shill Bitcoin to them (never push) but instead ask them (what do you know about Bitcoin)
2- if the response is positive then have a conversation, if neutral then educate, if negative respond when asking "why do you think so?" and keep on asking questions until you found the angle they are coming from
the best way for me, is to have them download LN wallet and send sats to them (real-time) .... let them be curious and give them room to answer questions

could we encourage other social media sites integrate BTC lightning?
encourage wont do the job.... it revolves around incentives ... businesses will integrate if they see value (fiat terms) and if there is technical assistance
You don't think stacker.news will eventually add other categories and topics?
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I believe they will, its a necessity as currently we can tolerate having topics all over the place as the community is small but if it grows bigger (more scattered un-categorised topics) it becomes impossible to find value (esp. for new posts) then you lose new members as their experience wont be that great ...... therefore i believe its a necessity for the future and I believe its a necessity now, building the foundation right from the beginning makes your job a lot easier
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