be careful .... a page with only a search box will violate Google's TOS - they see it as a MFA (made for adsense) page, and will close your account without warning within days of reaching payout
According to G's TOS your website/webpage must have content of value to the site visitor ...
I send alot of my exit-type traffic to various sponsors in the
COPEAC network.
They offer some of the best payouts in the industry that I have seen in the for PPA and simple leads.
I made $190.50 with my exit traffic for the month of September.
As long as the page you display the offers on does not contain porn, you will be fine sending your adult exit traffic to these offers.