Searching on Google Maps, it looks like the "HQ" is located inside Toronto-Dominion Centre, which is an office complex downtown, nothing too exciting to look at.
Speaking as an iOS developer, we use PDF files to represent our vector icon assets in the app.
I thought it was a bit odd of a choice on the platform vs SVG which seems more popular (and which the Android devs on our team use), but CoreGraphics using it internally ties the whole picture together.
There's already an Elo project for sanctioned events at the Grand Prix level and above: http://www.mtgeloproject.net/
It uses the public pairings and results that were published each round for events all the way back to the 90s. Unfortunately, there are less competitive MTG events these days, so most peoples' ratings stop in early 2020, but that's another topic altogether.
In Canada, ninth grade was around 14-15 years old, depending on the month you were born. I think the US has a similar timescale for primary/secondary schooling.
Yep, not surprised to see this added when Twitch account integration already existed. Much less typo-prone than copying your stream key in, along with all the convenience features you get.