I really don't care about your question in all honesty, I was just trying to be cordial. Your question lacked the detail to answer in the manner you expected, perhaps it was intentional to lead into another discussion or perhaps it was unintentionally vague. However since you have chosen to add more context to your question I will respond.
You are correct, I doubt I know even five percent but then again I never claimed to know a great number of them. Due to the vague nature of your question I made some assumptions, which I should have known better when responding to you. I have observed your style of writing for quite some time and should have predicted your question was not intended to be constructive.
I have worked for three different agencies in the last 14 years and I know what the agency policy and guidance were telling their 1102s so if they were following policy and guidance, then one could presume a great number of them. If you are looking for a statistical sample then no, my reaching out to a few contractors would not provide any relevant data. If one were examining positive or negative experiences for anecdotal evidence for discussion purposes (like this thread) than perhaps, but I now see that is not your interest. I doubt however that you will be conducting a scientific analysis of how many contracting officers or contractors have used this method so I am left to wonder what was the purpose of your question “How many contractors and 1102s have used the method and how many of them are you in touch with” other than to lead into some inflammatory discussion. Again, I should have known your question was not intended to constructively continue this discussion.
In my first post I simply posted the latest guidance from DoD and DAU, which Gov2310 seemed to find useful, rather than some outdated "Air Force Regulation 400-28, published in 1979, which become OFPP Pamphlet No. 4" and offers little to the original question posed by GOV 2310. But thank you for your history lesson although I’m not sure how citing defunct regulations answers the original question Gov2310 or supports an answer of “yes and yes,” but I am sure you will enlighten us with your sage-like knowledge.