I (still) have issues with dropbox link previews on Slack. I contacted Slack and Dropbox, I was going back and forth between them, because both told me the issue is on the other end. Since it shows "powered by Dropbox" on the links, I assume the problem is on Dropbox's end. Anyways, as I told them that I needed their help with this, they said that I should go to dropbox.support.com and look for answers myself since there is their chatbot (which is useless) and community that could help. What's the point of having a support system then if they're not going to help their consumers?