Good heavens Mr. Yudkowsky, I thought the inventor of Timeless Decision Theory would have a better grasp on how being the kind of person who would make a certain decision can determine what happens

I do indeed.

I've written unpublished fiction about it.

From before TDT was invented, actually.

Harry has not worked all that stuff out yet.

He did work out one important principle so far.

It is called DO NOT MESS WITH TIME.

And considering that he got that result, you seem to have missed some of the implications for how time travel works in that universe which would make it potentially dangerous to try and blackmail reality.

Time travel was the first optimization process I considered which was truly alien enough to deanthropomorphize my thinking; evolutionary biology didn't do the job, but the unpublished story I was writing about time travel did.

What you're suggesting is a bit more potentially incredibly dangerous than you seem to think.