yes

Personally, I'd just do that if the sub has a good analog here. Some subs really don't today, so if you post in one of those for people to come here, they might well just get disappointed, leave, and never come back.

I think that in order for it to effectively we would need to get moderators of sub's onboard. They can sticky posts keeping them from getting lost amongst everything else maybe get involved with moderating the community on Lemmy.

Some subreddits might flag too much Lemmy promotion as self promotion or spam unfortunately.

This was this missing link in all of this. I have no idea, especially after the AMA when it became 100% clear Reddit would never change course with the API, that subreddit mods didn't redirect people to discord/Lemmy/etc.