Yeah,

If they invested early and own a good percentage then the return on their investment will be positive which is why they do it. Betting company is a no brainer.

Foreign investment in the best economy to park your money is not strange either.

Although OP has a point, we expose ourself to tricky situations, for example if a company like Twitter is backed by foreign actors there should be some securities in place but free market/mah profits is important. For reasons.