I have noticed those authors and their votes, particularly the first, and it didn't look too pretty. And especially because it's a delegation.
The tokens would need to come from the exchange, and so i think i huge buy in, especially from someone like Nike would make for some interesting price action :)
Oh, 100% companies buying Steem would increase the price for us all... initially... but if you didn't sell straight away, you'd have SP on a platform that you can't access the reward pool on... which, I'm sure, would make it worthless. Basically, if lots of companies did the exact same as this media company, we'd have to move to another blockchain.