Yep. Just saw it myself.
A lot of it looks like small 10% increases though. There's a lot of stuff that's only 1-2 dollars more than what it used to be in USD. Even so, a lot of the prices seem to be around or even sometimes less than what we paid when Steam was still using USD.
For example, if I bought COD AW in USD it would have come out to $66 CAD after conversion. Right now COD AW is listed at $64.99 CAD, cheaper than what we got when still used USD, and more importantly significantly cheaper than buying the PS4 or XBone version at retail. Then there's NBA listed at $69.99 which is just... lol. Oh and no taxes. Everything turned out somewhat okay.
If that's the case you're better off getting the game of GMG then with their 20% off codes. In fact, if you are getting a game within the first few weeks just use GMG. Save a couple of bucks. It looks like we can still use third party Steam sellers like GMG so all is right