Hi,
by “bounce time” do you mean people that come and then leave without clicking on a link?
if you’re targeting keywords like online casinos … provide links to online casinos.
if you’re targeting online slots tips …. provide tips and expect a lesser amount of interest of people clicking ads.
its all about getting what you want. if you visit a site to buy red wagons … you want a list of red wagons to choose from.
if you want information on how red wagons work … provide that info and expect to get less interest in the ads you run selling red wagons.
my 2 cents.