"invested" ? Look i can invest in shares, or BTC, or forex, or equities... but this is not "investment" if you refer to the "generous donation to CRoberts hollywood fame goal fund". I'm sorry but what i can see in 3.9.1 is not a $300M and 8 years product (*). It's a quickly slapped-together Crytek Engine demo with broken physics coded by a complete beginner, networking coded by someone who never got past the 1990's, with a complete absence of a proper vision that would hold everything together. I am now completely convinced that CR doesnt give a flying rat bottom about that product and is just there for the cameras, and his motion capture setup where he can talk face-to-face with A-list actors and play make-believe film director. I dont know if he ever intended to deliver anything, maybe in his mind it was just "code some magic and shazam, it works, after all it's just like Lego" and got completely out of his depth once reality kicked back in, maybe he intended to finance his wife career, who knows, in the end the result is the same.
And please, avoid "BuT tHeY aRe CoMmItTeD tO SQ42 !". This is at a complete stand still since about 6 years by now.
(*) the 3D assets (especially meshes) are cool, granted. Not $300M cool though.