If you are using a web browser that supports webp, it can potentially improve load times by a lot, as webp is much more space/bandwidth efficient. I'm assuming this is why the instances are auto converting from other formats.
Technically, by searching about the brazilian fart thing, he can find out which of those sites are going strong and which of them arn't, and if any of them are small enough and publicly traded, dump your savings into
Although, butterfly effect is a thing, and the person did not specify how the time travel affects the timeline. If the time travel happens in a way that the butterfly effect will happen, the lotto numbers could potentially change as well
Yeah, you're only locked out of pacifist if you previously did a genocide run
Edit: looking at the wiki, this isn't true, there are minor differences in the soulless pacifist run tho