About 50 operators were in the mix at launch, as the province moved to a private-operator model with new revenue and player-protection rules.
The free pop-ups will run from July 13 to 18 with games, prizes and giveaways.
The province says more than 55 platforms have been approved, but operators still need regulatory clearance before taking bets.
Different industry tallies also show more than 55 approved platforms and 49 registered operators before July 13.
The province’s new iGaming regime opens with a warning to unlicensed sites and a promise of tighter enforcement.
Bonus offers can only be pushed through direct marketing or operator sites, and celebrity promotions face sharp limits.
The company told Alberta visitors that new registrations were on hold, while Alberta’s regulator continued to ready an open online gambling market for 13 July.
Pre-registration has begun, but real-money accounts, deposits, and betting through Hollywood Casino Alberta remain unavailable until the province’s market opens
Play Alberta, already the province’s only authorised online option, will share the market as operators move through licensing, registrations and customer pre-registration ahead of July 13