Memes

Tldr: it's a philosophy Microsoft has used extensively in the past. You join in with a new industry then simply outspend the competition making it harder and harder for them to compete just because they are not the size of you or as already entrenched in other areas. The last E, extinguish is for things they don't like. They become the monopoly player then shutdown their own product/service, and now it's gone

Read the title

(I also skipped the title and was confused for a minute)

Not being snarky, but Google "Embrace, Extend, Extinguish" for some interesting context for what Meta might be trying to do with Threads.