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No. Not only I
Don't own one, but I'm also
Not using any.

                 - gtg


I'm a bot. I detect haiku.

Thank you @gtg 👍😀👏

Why not just create a separate pool for downvotes without reducing the share for authors?

Downvotes idea is separate from author->curator shift and source for SPS.

As I understand it both are intended to reduce the prominance of bidbot spam but I think only one is necessary.

Why do you think both of them are necessary?

They are meant to solve different issues, please read the proposal.