It’s incredibly hard (read: impossible) to make top-down dogfood pushes across a massive company like Meta. You have three options:

1) Create an team to internally sell it

2) Make it an ultimatum, and fire people if they don’t agree

3) Hope your marketing is good enough that you get grassroots adoption

Option 1 is a waste of money - your best sales folks should be making money, not doing internal processes. Option 2 is terrible for moral and retention. Option 3 is ineffective. I’m sure Zuck would have loved to have the whole company on the metaverse if he could.