The supplier plans to offer its around-the-clock ESportsBattle tournaments, data, odds and streaming to licensed provincial sportsbooks.
A C$1,000 parlay generated unfulfilled cash-out offers of about C$380,000 and nearly C$100,000 before settling as a loss.
AGCO said a single player account went more than a year without the required checks, while NorthStar says it has overhauled its compliance programme.
The regulator said the banned feature was available on multiple slot games for months before it was disabled.
The betting group still needs a separate iGaming Ontario contract before it can go live in the province.
Nine people under 19 were able to create accounts, deposit funds and gamble.
The province’s gambling watchdog says it is examining allegations raised by investigative reporting on Soft2bet and affiliated casino sites.
The regulator said high-risk patrons were not properly tracked and suspicious transaction reports were missed.
Regulator says revoked or unapproved bill validator software bypassed safeguards at four Ontario sites