I have added a new banner in a column of my website where banners are random in vertical position, so no one is fixed up or down, they change on every load. I have been testing to reload website many times to test the new banner "randomness". I had it in first position 10 out of 50 times and rest of times was at very low positions.
Is the bigger banner I insert there (450 high. 240 was the highest before that), can it be because of the size?
Is there something I can do to add a ponderation to that banner randomness so it loads in upper positions 0,5% times more than others?
Thanks in advance and regards.