You really should talk to your sales rep for an "official" answer -- but in short, no. Your approach would essentially "multi-plex" a single Tableau license to serve content to hundreds or thousands of your users. That wouldn't be fair to Tableau, and many (most?) software companies do not allow this.
Your sales rep can explain the options you have around serving Tableau content to external users (by this I mean the cutomers of your company vs. your internal users).
Based on the scenario you've painted, you may very well want to talk to the OEM team - we specialize in working with customers who embed Tableau into their products for consumption by external users:
Thanks Russell It is helpful. We understand that no one will allow this.
I got similar feed back from other team so we will try to get official info from sales rep to understand what is best suited for our requirement.