In this case, Party B is sandwiched between Party A (scraper such as Meta) and Party C (the third-party content provider). The scraping agreement dictates A-B relationship and the licensing agreement dictates B-C relationship. Devil is in the fine print as far as what is allowed in both agreements.

Party B has already committed to uphold B-C. Entering A-B may put them at risk of violating that agreement by appearing to grant Party A rights that Party C never granted to anyone but Party B (and maybe even rights that Party B doesn't enjoy). Party B's options are don't consent to A-B (e.g., withdraw from Meta program), take down the Party C content (which would suck if they've already paid for it), or negotiate a carve-out with one or both of Parties A and C.

(IANAL)