The full press release says in 3 different places that Fargo will be on FX, so it sounds like they will be moving it like they did with Married. Both Fargo and Married air on FX in the U.S., so I think Rogers was putting them on FXX Canada to flesh the channel out a bit while it got up and running.
For those that missed past seasons, the press release also says:
Viewers can catch up on their favourite FX and FXX shows American Horror Story, Sons of Anarchy, You’re the Worst, The League and Fargo (available Sept. 12) on shomi before their eagerly awaited premieres dates this fall.
P.S. Telus now carries FXX.