In our experience, we received a high bounce rate of 80+% and about a 20 second time spent on page. This is definitely some of the worst traffic you can get. So

In our experience, we received a high bounce rate of 80+% and about a 20 second time spent on page. This is definitely some of the worst traffic you can get. Some days you'll get much worse results, like 95% bounce and 8 seconds on page. Keep in mind that once you put the money in, you can't get it out. So, even if you do test, put the minimum amount of money in.