There are a few Mastodon bots that do that for some prominent Twitter accounts. I suppose it could work for links here but wouldn’t really make sense for text posts.

They are hyperlinks, there is nothing unethical about sharing them.

Not sure about that, it could end up being counterproductive, I mean, reddit is full of spam, if there’s no good antispam feature here you could ruin communities with a bot copying content.

Not to mention that if someone on reddit realizes there are bots copying content, they could even spam the subs on purpose.

I believe it would be better to do it manually, copying the source in case of links, not copying text post, that wouldn’t be honest IMO.

Personally, i wouldn’t be opposed to that. I think a lot of potential lemmy users might be turned off by the lack of content here. Then once the user base on lemmy is more self sufficient, we could taper off the cross posts.

In some communities I was already repeating the same advice over and over again like a parrot.
There was so much traffic and desinformation that the same question would pop up 30 times in an hour.
Since some of the comminities I liked I haven’t been able to find here, I just… created it. And am slowly filling it in with everything I amassed during my reddit time.
People may find it useful or not, and may begin engaging with it or not (hope not, cause I wasn’t born to “mod”) but at least I will have all advice and resources in one spot, neat and tidy. And if anyone needs it, it will be there.

I was having the same thought, mostly to kick-start some of the smaller niche communities that I used to use on Reddit.

that or create anew

I think it would be fine. It would fill the communities a bit.

Depends on the community and the content. Informational links seem like fair game to me in most cases.

Copying content? No that will piss off a lot of people and makes Lemmy look desperate. Give it time to grow organically.