If you have a domain which you aren't using (no Web site there), it might still receive visitors. Like if there was previously a site there, or if the domain has basic keywords. These advertisers specialize in helping to earn money in this situation. You can park your domain with them, and visitors will see a selection of paid text ads (mostly CPC, but some CPA) with you receiving a share of the revenue. Some also act as brokers to promote selling a domain, if you wish.

19 Parking - The percentage of revenue share is based upon total earnings (i.e. domains generating more gross income will receive a higher percentage.) Offers two tier referral payments. Net 45, minimum $50, by check or PayPal (or wire transfer with a minimum of $250.)

Active Audience - Offers six templates. Uses Yahoo Search Marketing and others for the listings. Offers check, wire transfer or PayPal. Net 15, Minimum $50/check, $10/PayPal, and $100/wire. Also allows you to list the domain as For Sale, if wanted. International publishers OK.

Ad Median - Offers banners, pops, search boxes, and domain parking. Two tier. No minimum traffic requirement. Net 30. International publishers OK.

Afternic - Works with Fabulous and House Parking. Net 10, minimum $25, by check or PayPal. They also have an affiliate program for domain sales.

Domain Parc - Based in the UK. Net 30, minimum £25.

Domain Spa - Links are based on a general category that you select, along with attempting to check the domain's past history of content. They also have an affiliate program for signing up new domain owners.

Domain Sponsor - Allows only type-in, organic search, and residual expired domain traffic (you may not promote it in other ways.) Owned by Oversee.Net, and related to Information.Com. Rotates layouts, and optimizes for different keywords. Requires publishers to own at least 50 domain names. Optional "For Sale" link. Net 7, minimum $50. Check or PayPal (or wire transfer is over $5,000 per month.) Two tier. International publishers OK.

Dotzup - Willing to start with only one domain, but they refuse to disclose their minimum traffic requirement. Net 45, by check, PayPal, or wire transfer. International publishers OK.

Express Pro - Offers hosting, DNS management, and geo-targeting. International publishers OK.

Fabulous - Based in Australia, and owned by Dark Blue Sea. Net 10, minimum $25 for check or PayPal, $1000 for wire transfer.

GoDaddy Cash Parking - Run by a major domain registrar. You don't need to have your domains registered through them. But note that they charge a small monthly fee to be in their program.

Google AdSense For Domains - They say that they are interested in "large domain portfolio owners."

Hit Farm - Requires each domain to receive a minimum of 5,000 unique visitors per day. Two tier (limited to three months residual.) Net 30, minimum $500, only pays by wire transfer.

iMonetize - It appears that their optimization system tries to point your domain to a group of other parking services, to find the most profitable one for that day. They also have an affiliate program for signing up other domain owners. Net 45, minimum $25, by check, PayPal, or wire transfer.

Most Wanted Domains - It appears that you must email them for details.

Name Drive - Net 15, pays only by PayPal, direct deposit, or wire transfer, with minimums ranging from $20 to $200. Offers two tier referral payments.

Parked - Seems to focus on providing CPC links from Yahoo. Founded by the owners of directNIC.com. Requires a minimum of ten domain names. Two tier. Pays twice per month. Net 7, minimum $20. Direct deposit, Paypal, check, and wire transfer. International publishers OK.

Parked.Ru - Seems to be based in Russia. Minimum $10, via WebMoney.

Parking 4 Income - When we checked on 2 October 2007, they stated that they are in "Pre-Beta," and aren't fully up and running yet. Their system seems to require you to use your own Google Adsense account.

Premium Traffic - They optimize links based on the terms used to find your domain via search engine traffic, and also allow keyword selection. Net 35. International publishers OK.

Revenue Direct - No minimum number of domains necessary. Only pays for traffic from English-speaking countries.

Skenzo - This one also seems to be seeking, "large domain portfolio holders."

Sedo - Select a keyword to target the paid links selection. Offers six different layouts. Also offers domain escrow and brokerage services. Pays by check, wire transfer, or PayPal. Net 15, minimum $20/Paypal and $50 check or wire. International publishers OK.

Sell My .Com - Mostly a domain name appraiser and broker, but also offers parking. Pays monthly, minimum $25.

Target Words - Offers 1 - 8 cents per click. Text links, search boxes, an pops. Allows 404 and domain parking pages. Net 15, minimum $25. Two tier. Owned by Oversee.Net.

Top Web Names - Mostly seems to broker buying and selling, but also has some parking functions.

Traffic Club - Selects between various PPC feed sources. Net 30, minimum $50. Owned by Moniker.

TrafficZ - Requires that you have a minimum of 100 domains (with exceptions for especially high-traffic domains.) Offers both CPM and CPC. Minimum payment $25, by check or PayPal. International publishers OK. Owned by Thought Convergence.

Why Park - They feed a selection of articles, press releases, and other content, based on keywords that you choose. Note that they charge a one-time fee of $99.95 for setup of up to 100 domains. Offers two tier referral payments.