Hmmm, I 100% disagree.
Advertising, according to Wikipedia is 'a form of communication used to help sell products and services.'
I did not say 'go and buy a cheaper essay from D-E.com'.
I did not pose as a pretend customer from a proxy IP, or even my home IP address, and pretend I'd used either site to encourage others to do the same.
I was very frank that I worked for the company, and I answered (very neutrally) the question. (E.g. I did not even try and promote our more expensive service and advertise why it's better). I simply distinguished between the two, and provided a link so people could go and investigate the difference for themselves.
Again, as I've said in this forum before, isn't it better for me to clarify something like this, rather then let people sit on here angrily thinking 'oh they've tried to scam me, they have cheaper sites out there.'
It's just a different service, and you get less/more for your money accordingly. That's all I was stating.