If you're a big company, your C suite will be inundated with slick advertising from Oracle, in airports, on MSNBC, in person via networking.
If you're a big company, their sales people will call you, and then they'll find some problems from the top down that Oracle can Supercharge for you.
Think of it like restaurants that don't show prices. If you're very price sensitive, you're not the target market. You don't want them and they don't want to haggle with you. It's not worth spending a lot of sales effort over a small contract
(But I find the AWS story pretty telling! Seems they developped immunity the hard way from a past encounter)