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@FandaSin @BeAware Yes this is possible and I think it's been discussed as a solution. The concern, last time I was reading about it, is that malevolent servers could poison a link preview and send fake images along with the url (this argument against this is you're already 'trusting' the server if you're federating with them, so that trust should extend to link previews)

Another proposed solution was just having servers wait a random amount of time before fetching the link preview so not every server is requesting the preview at the same time