TNX is link exchange program but also similar affiliate program to Text Link Ads. So you can imagine how easy it is to make money if you have website with some Google PR on your site. The earnings are calculated automatically and if you have site which has 1000 inner pages and all of them have some PR than you get really good money. This system calculates earnings automatically and TNX takes only little share of 12,5% so there is big earning potential for you since it is also cheap advertising for advertisers. There is also good referral program where you make 10% of your down-line earnings so not like TLA where they pay only $25 one time bonus for active publisher. TNX also pays share if you refer advertisers. All your earnings are points which you can sell at any price to TNX members for money or get for them links and than its classic link-exchange. You can combine TNX adverts with others like with Google Adsense and this way make more money from your traffic.
Payments are variable depending on others but most typical will be Paypal.