I always found science and history interesting even though i hated school.
Maths though, i always resented "you wont always have a calculator" … but now as im older i imagine kids today having a similar idea about "AI" and i can see that not ending well for anyone.
I think sponsoring people who already use your product is a valid way to get more attention but thats about it. I do everything i can to avoid advertising as i find it personally offensive in the same way some people find pornography offensive and i think it should be treated similarly.
They just borrow money with their portfolio as collateral, the more their portfolio value increases the more they can borrow without having to cash anything out that woild result in capital gains.