Or they could be grabbing, I don't know, parts for a superweapon? Which could just be to destroy Yggdrasil? It's been stated from the start that they're not in this for power or money even if they might get some of that on the side, they're absolutely going for the destruction of the UMMA. Taking out Yggdrasil is the logical way to do this.

I'm not saying whether anyone's guess is right or wrong, but seriously.

I'd much rather reveal things organically rather than just post everything I have in mind. The only mistake I can possibly think of is not exactly clarifying what object is intended to do the destroying of the UMMA, but I didn't want to just tell everyone that.