That's a different lounge. There are two Aspire lounges at YYC. One of them is in the transborder area (i.e. past US pre-clearance, segregated from the rest of the airport), a.k.a. the E gates, which is the one you're talking about.

The lounge referenced by the posters above is the lounge at the D gates, which before COVID was the international departures area, only accessible if you were on a flight departing Canada (and excluding US flights). With the recent nonsense inflicted on us by the incompetent people who run YYC (what's relevant to this thread is international departures are no longer segregated), the (formerly) international Aspire lounge has been accessible to AC pax.

The international Aspire lounge is generally nicer than the TB one, and in particular has had much better food offerings in the afternoon/evening.