Clicksor is one of the current leaders of the small publisher Adsense competition. They have payouts upto a market leading 85% and unlike a number of alternatives the cost per click bid values are high enough that you can earn a decent income. They are also, in my experience, much more tollerant than Google. Their terms and conditions suggest that you should only place one copy of their code on a page but as long as you only place a single pop-up or DHTML code on a page they seem happy to let you place many context sensitive ad blocks on a single site.
Clicksor also has a big advantage over a number of the lower ranked alternatives on this site in that their ads are truly context sensitive. Thus while you can provide keywords they have technology that will also show ads targeted to the content of your site. This means your visitors are exposed to ads of the same subject as they were searching for when they reached your site and thus vastly increases the click thru ratio and thus your sites earning potential. The context sensitive nature also saves you the hassle of having to specify keywords for all of your sites and decide in advance what people might be looking for.
The online stats provided by Clicksor are not perfect but they are enough for you to keep track of the trends with your site. They also allow you to add as many sites / domains as you want under a single account. You also only need the root page of your site approved. Once this is done you can place ads on all of your sub pages.
The payment schedule with Clicksor is also much better geared to the small site owner. In any pay period in which your earnings exceed $50.00 ($20.00 with PayPal), payments are made either by check or instantly through PayPal ($20.00 minimum for PayPal). Revenue totaling less that $50 (PP $20) will rolled into the following period. The pay period is based on a 15 day schedule so you can get paid much more frequently. Clicksor also do not require a Social Security (SSN) or Individual Tax Identity Number (ITIN) to join and so while this 'technically' does not help
US site owners with their tax liability it does make it much easier for non citizens to join up and start earning revenue. US
That said I have had several reports of late about Clicksor becoming more picky about who they accept and rejecting accounts. This is especially true of sites not based in the
USA, Canada or the as well as sites not predominantly in English. I have also seen issues with their reporting of earnings, especially referrals not working properly. Thus I have moved them further down the list but I still recommend you to try them. UK
Advert wise Clicksor features:
Multiple formats available including text, image and animated ads.
Interstitial Ads (NEW)
Dynamic (DHTML) highlighting
Click here to visit Clicksor's website and sign up for an account to try it out. There is no obligation and no fees ever. Note, once you start adding the advert code to your site it can take up to 24 hours for Clicksor to get up to speed as it were so initially you may see some ads that don't appear to be relevant. Once their contextual engine kicks in, however, the relevance quickly improves