Hi Toxsin,
I don't think there's any need to send a moderator your Intro Essay. If you posted it in the proper section, many users (including more or less moderators) will have the chance to read it, and the promotion system is a community work - not a personal agreement between you and a moderator.
If you want to be promoted as a full member, posting a good essay, respecting the Attitude and contributing with relevant posts is the way to go. No need to start a commercial campaign