This time.
If you did that to me, I would blacklist you permanently (electronically and otherwise).
Why? Because it's dishonest. You're trying to trick someone into believing that something (a thread continuation) is something other that what it really is (unsolicited email). I learned this line of reasoning from business people far smarter than me: "If they'll stoop to a dishonest trick just to make an introduction, who knows what they'll do when the stakes get higher."
Make the most of this opportunity now that you have it, but I'd seriously reconsider ever doing it again.
Other HN readers, just because OP is sharing something that worked out well doesn't mean you should too. Please don't do this. The world has enough people taking shortcuts instead of doing the right thing. There's plenty of opportunity for smart hard-working people to succeed on the up and up. That's what you should be focusing on.