I used to use DropBox quite a bit for file sharing directories of photos. I used to be able to upload them, create a shared link for the directory and just email that link - no need to invite specific people as collaborators, and the space used by the folder wouldn't be deducted from the recipient's quota.

They've since employed every dark pattern in the book to make that flow next-to-impossible, without having technically withdrawn it.

Yesterday they emailed me to say "We've noticed you're not using your DropBox account..."