I always notice a slowdown after april.
I didn't use to notice it at all but the more sales you make per day the easier it is to see. The summer doesn't mean ppl completely start buying porn but your ratios migt get worsened by 1:10 or so depending on your traffic but no big deal. I also believe that some programs take advantage of the hype and put some shaving into effect.
Oh and if there is no slump at all then it's just nice of the sponsors to offer all the extra large payout days. All you ppl who love being cocky saying there is no fucking slump cuz you are doing better than ever, welcome to the biz, stick around a few years and you'll see there is an effect, how much depends on your site.
