David is a QVC employee, i.e. a sales rep for QVC, An employee of QVC selling Their selection of products.
Temptations is a "house brand" of QVC. It is the same as a "house brand" of CVS, Walmart etc.. (Do you have xxx cough medicine? No, we have House Brand xxx which is cheaper but more peofitable to us.
It is their (QVC) choice to sell their own brand and not others. They earn more money (profits) from their own brand and not a competitors.They (QVC) may have exclusive contracts with other suppliers, i.e. WEN, Philosophy etc. to solely sell their products at a very profitable exclusive arrangement without telling fheir customers (Us).
All in all, it's not complicated. David and Carolyn, Jane, Mary Beth etc. sell what QVC tells them to do,
It is our choice to say ---- Yes or No.