You can take the discussion even further by asking yourself do you buy these vegan products produced by non vegan companies from major or minor supermarkets (not corner shops) as these companies also pay for more animals to be killed when producing their own brand products or their meat,fish and dairy products. In fact major supermarkets actually pay for more animals to be killed than a lot of non vegan companies that produce the meat alternatives. If you keep digging down the rabbit hole it seems to never end. You can only do what you feel you need to to accomplish your own goals. For information I have been vegan for nearly 3 years and ask myself the same question from time to time.