So, Vaniver, are you personally going to cooperate with this guy in the "donating to MIRI through you" project?

No, as detailed in the ancestral comment:

Whether or not this is within the letter of a match policy depends on the specific policy, but it's typically against the spirit and recommended against by Double the Donation. So even if there is no lurking chargeback, I would caution against this as burning the commons for short-term gain.

I did encourage him to reach out to MIRI and figure out what their fundraising plans are, and whether or not he can pledge matching funds for that. (It seems like MIRI is likely to continue their open-ended fundraisers, but we'll see.)

I am talking with him about his eSports gambling methodology, and trying to help him find an EA to work with on that. I would be happy to write an article about the results once there's enough info to do a retrospective.