Think about it when you are well established would you like it if somebody kept taking all the newly built houses and people who have just moved into that empty house from right under your nose. in the end we will not have rounds anymore we will have all over the place thingy`s with at least 10 window cleaners on every street all cleaning 2 houses each. if milkmen did the same we would have a queue of milk floats coming down my street every morning