I was sent a message on May 29th alerting me of my suspension, with no explanation, only that they would be sending an email explaining why. I sent an email to their help desk explaining I was a long time member with thousands of posts, none of which I considered to be against their policy. They acknowledged my email and said I'd get a reply shortly. I have not heard back nor do I expect to. This is not the first time this has happened and I have learned my lesson. They have no regard for their members and their customer service is nonexistent. Never again!

I think the deleted my account because I expressed no interest, and deleted their adverts.

I had a similar experience. Personally I believe they bump non business clients like us who have huge amounts of pins and boards which probably takes up a lot of broadband storage. I guess I was one of the "lucky" few because I received a response:

Harper (Pinterest Help)
Jan 4,15:51 PST

Hi R******,

Your account has been permanently suspended for violating our Acceptable Use Policy. For more information, please review that policy.

Your account will not be restored, and you won't be able to create a new account with this email address.

Harper | The Pinterest Team

How nice! No specifics. No apology. Just terse arrogance.