lol, thats totally fine, as long as you politely say no to them, and the people who contact you are not rude you.
People are free to contact you and you are free to say no. Lets not take it personally, and Co. does not keep a count, how many times you have been contacted.
Its a free country, all people do is to check your interested. Thats it.
One comment that you made, "for the company the money comes in from multiple channels but majority of the ‘independent distributors’ dont make money by selling products, but through the downlines, and seminars etc for their down lines. "
Quixtar, does not conduct any seminars, it is the association of independent distributors that conducts these seminars, so Co. does have any income thru that.
Independent distributors do make money by selling products. Because, they get products at whole sale and sell it at retail, thats normal. It like any other business, like any other store.
As long as you are neutral and polite, there should be no reason to get offended. all the best to you.