I’m not sure how well this works for a bingo square, but something that I thought of was about how nigh every paywalled article has an archive link either in the post body itself, or in the comments.

I find it heartwarming that such considerate behaviour seems to be the norm here. It inspires me to be one of those helpful people adding an unpaywalled link in the comments in the rare case of finding an interesting post where that hasn’t been done yet. It makes me feel like I’m part of a community.