Memetic

8 hands? Nephila, your first spider waifu, is looking for her wayward husband.

He's right, mobile games aren't games (and I'm saying this as a serial repeat gacha offender).

Why doesn't he just forfeit after she reveals her ultimate?

Very reasonable. The security team just doesn't want Gawol to croak and die and end up with either a lawsuit or public shaming that leads to a drop in the stock price. League Operations Team probably gets a bonus depending on the number of viewers.

I didn't expect this to turn into one of those doujin.

MC's capabilities here are beyond the level of just a graduate school engineer. Being able to comprehend Dr. Kuroi's work at just a glance and being able to grant emotions with some minor tweaks means that he's actually got some mad scientist superpowers of his own. Maybe it's from testing his superpower enhancers, since they work on humans.

Why did they think MC was the boss' mother?

It feels like this is foreshadowing for the hero party to eventually show up. Maybe even that first returnee is the Hero?

Seems like it's a gacha with a <0.1% SSR rate but with a 300 pull pity.