What I've always found unusual (but not necessarily bad) about BS is ... how come a company that came out of nowhere starts buying tech companies here and there? Billion dollar deals? In cash?

It can't be just a few "enthusiastic" random guys (as they portray), you need a lot of capital to pull that off.

IMO they're someone's family office with an obfuscated name.

Edit: and my comment suddenly goes to the bottom despite having several upvotes ... definitely not sus.