They already have, and if the US Government would allow them to make another acquisition over $1bn, they already would have (I guarantee 5 different Biz Dev associates have made very long PowerPoints about Roblox and Rec Room only to be told the idea is DOA).

It's actually kind of amazing that Mark's off-putting personality and desire to remain the face of the company is what will kill it (let's just hope Aaron Sorkin stays alive long enough for the sequel, because it might rival Citizen Kane).