I heard this rumor early this year, but still no Airdrop yet.
There’s nothing to lose if you will just try and use their platform just for the benefit of this airdrop rumor, maybe this will be the biggest Airdrop for this year or maybe next year. If you have extra funds or using metamask for quiet some time now, you already have that assurance. Airdrop will still depend on their value though, let’s see if Metamask will still push this through.