I have a business directory (no specific niche, it's a broad US small biz directory) site with 3K-4K uniques per day and increasing every week, i have Adsense and this is the only way i monetize it. I need some suggestions for other income streams, here is some stats about the site:
91% U.S. traffic
Bounce rate is 90% (i guess they just look up phone or other info and leave)
New Sessions: 95%
Avarage Session Duration: 26 seconds
Main traffic source is Google organic (92%)
I think of adding an exit popup and building a list but don't know what to offer or what will i do with the list afterwards
All ideas are more than welcome...