It's still blocked on Amethyst. Seems cached.
I close amethyst then reopen after I follow wino on snort. Now it's fixed. I see the DM on amethyst too
Discussion
Unfortunately it seems like Amethyst is blocking the account at an application level right now, not actually putting it in your mute/block list.
We may have triggered some of #[6] automated spam filters with the DMs tonight. Will wait for him to provide more info when he has free time.