Yes, several years ago I ran a self-created political site in favor of a specific candidate. I stated in the Privacy Notice that all information collected would not be shared and be deleted after the election. As I recall, I collected name, birthdate, gender, email, address because I wanted to correlate and display the info in a summary fashion, and I allowed people to make comments and come back and edit them so I had a password system, and some other things.

I had a few people contact me and offer rather significant money for the info (in total over $10K) if I'd quietly sell them a copy before I deleted it - pretty disappointing to me that they thought I'd do that.