Iran's President to Trump: I will not negotiate, 'do whatever the hell you want'
‘Startup Nation’ Groups Say They’re Meeting Trump Officials to Push for Deregulated ‘Freedom Cities’
‘Startup Nation’ Groups Say They’re Meeting Trump Officials to Push for Deregulated ‘Freedom Cities’
‘Startup Nation’ Groups Say They’re Meeting Trump Officials to Push for Deregulated ‘Freedom Cities’
It will automatically if the target site doesn't block the request (Cloudflare, rate limits, etc). Per community rules and best practice, the original article URL must always be the post url; uploading a thumbnail will override that (currently).
Once LW updates past 0.19.6 or so, there should be a field for custom thumbnail where you can do so (in addition to the post URL). I don't know how the rules apply to that (not yet relevant for LW), but I would hope people wouldn't abuse that to post unrelated images. Prob something to bring up to the mod team once LW updates to a version that supports custom thumbnail images during post creation.
IMO, just drop the original link. If the thumbnail works, it works. If it doesn't, it doesn't.