I dunno, why wouldn't it be okay? I interact with a lot of companies on a day-to-day basis; big ones (Facebook, Google), small ones (the corner shop I bought an energy drink at on my way to work), and everything in between.
Offhand I'd say that none of them have a legal expectation to work in my best interest, nor would I have expected any of them to, nor do I believe a law requiring them to would be workable.
My interest in buying an energy drink is to get the brand I wanted at the lowest possible price; the store's interest is in selling it to me at the highest possible price. If they had to work in my best interests would they be required to sell it to me at cost? Maybe I drink too many energy drinks, would they be required on pain of criminal sanctions to try and talk me into buying some fruit juice instead? The mind boggles. :)
Or do you think there's something special about this particular product that makes it different than every other good or service in the economy? Or that their very vague ads somehow set up a special relationship that's more akin to a doctor/patient relationship than the borrower/lender relationship one would expect from, you know, a loan company?