Once I provided them with my e-mail, I started receiving "You must take us to your leader" messages in a tone as if I was their employee and they were commanding me to take them to my CEO. I can't imagine myself chasing the CEO in the building because some sales people in Oracle told me to do so :)
To be fair, after being in meetings with theirs sales engineers(who wore the best shirts I've ever seen) a few times I grew to respect their stubbornness and the way they structured their corporate machine. It's a valuable lesson to have an exposure to corporate dealings I believe, before that I used to do freelance stuff and had no idea how a simple webpage can cost millions and why a large corporation won't buy that easily from a small company with similar or better product at the fraction of the cost.