Hello, I'm new to flying Air Canada and will be flying East coast US (BOS) to Canada (YUL/YYZ) to another Canadian city (YVR) to a TPAC flight.

I noticed that the Air Canada Gogo page (ahead of time, not on board) offers a 1 hour or one way (the Terms make it seem like it's one flight only) pass. The US Gogo site also sells "Domestic" day passes that work on Air Canada, but it doesn't define what Domestic means (within the US only? US and Canada?).

I've read the last 12 pages of this thread, and didn't find what I was looking for, so here are my questions:
1. Do they sell an international day pass?
2. If not, how expensive will the full flight passes be? (I'm flying BOS-YUL-YVR-SYD and then SYD-YVR-YYZ-BOS a month later). Am I correct in assuming that I'd have to pay per flight? (I did see the post saying that it will cost less onboard)
3. Since I'll have three legs in each direction, would I be better off buying some sort of plan?
4. Is the overwater TPAC service Gogo satellite?

Aircraft will be A223, 77W, 77L (x3), and CR9 (I know that CR9 will be hit or miss)