I'm sure a lot of British people want to run UK-registered companies! I'm not saying Canadians wouldn't rationally prefer to have the option of taking investments in a Canadian corporation, just that it doesn't look like there's a lot more to this than details for your finance person, and that it's the same deal every other country gets.

Read the thread: clearly a lot of people are reading this as "you can't HQ in Canada, your team has to move".

Right, I agree with you that where the business is incorporated has essentially zero bearing on where its HQ is, where it can operate, hire staff, etc.

But I think that it counts for a little bit more than just "details for your finance person", since the tax and grant eligibility implications could mean that some startups would be better off incorporating in Canada and not taking the Y Combinator money. But if you're taking the VC funding route (which most applicants to Y Combinator are), then I agree that none of this should really matter very much.