Large companies don't worry about this because they already have tooling that scans code and matches it against other public code out there (to avoid legal troubles if some dev quietly copies some GPL'd code or something like that). Everybody else basically has to manually check every snippet produced, which makes all the supposed convenience moot.

Between that and the typical quality of Copilot snippets, it's pretty obvious who the real beneficiary of this technology is: large sweatshops like Infosys.