Ideally, an un-paywalled version can be found. Even if one can't be found, it is still much better to post the source.

Can we make it a habit to post source links? I don't want to surf completely on vibes.

If it is not funded through user donations, how is it self sufficient? Genuinely curious.

Wikipedia is set up as a nonprofit. They have annual fundraising drives asking their users for money. They also have an endowment and receive grants.

A donation drive could be a good model but the decentralized nature of the platform would complicate things.

Same. Always kinda talked myself out of commenting on reddit because my comments would never be engaged with. Felt like I missed the boat there. Time to start over and build a new community.