Its basically impossible for them to not notice. I know someone who is a software engineer for lockheed. He told me that back in the 90s he wrote a bunch of software for a missile. He wasn't told that is what he was working on, it was all classified, and part of that is you only know what you need to know. But from the specifications and how the math worked, it was very clear to him that it was a surface to air missile. After the fact, it was confirmed that is what he was working on.

Google and Meta are surely more open than a classified missile project. So it would really be beyond the pale for someone to not realize that what they are working on is an additive platform, sure I am willing to bet they didn't say "Addictive" and instead cleaned it up in tidy corporate product management lingo, "highly engaged users" or something like that. But its just impossible.