- they're going to do their evil thing anyway, may as well show up and intentionally do it marginally worse
- they're going to pay someone large sums of money, may as well be me
- I increasingly believe this whole industry is net evil overall, and large sums of money mean I can leave it sooner
- also, it was their VR thing, and if it was a VR thing at literally any other company I would be excited about that because VR is at least conceptually cool
These are not particularly good arguments, and that's why I don't work there now. But statistically, I can imagine a few people who we would otherwise categorize as non-evil actually convince themselves with arguments like these, and when you're casting as wide a net as Facebook does, a few is all you need.