What Intuit acquired was TradeGecko and then turned it into “Quickbooks Commerce”.  It’s a standalone service (like QBO), it doesn’t integrate with QBO. That might be fine if you’re a new user, but it specifically says it’s not for current QBO users (at least not yet - guessing there’s an issue with data migration). 

So, for people like me who have been using QBO for almost a decade, it’s another non-option.