Here is one guy using the same script/database to generate the same exact pages over multiple domains (and I'm not talking just 2-3). He does use a noarchive tag, so who knows, the pages may well be cloaked.
premiumxxxlinks.com
netcybersex.com
finderoticlinks.com
foxypetites.com
jackoffsites.com
viewpornos.com
foxytranssexuals.com
smutplaza.com
nakedblondies.com
nakedpeeing.com
11inchdicks.com
xlbreasts.com
nudesites.net
xxxsexorgy.com
sexyviews.com
ipornlinks.com
xxxnakedsites.com
over30porn.com
xxxindexer.com
xxxexhibitionists.com
nakedbisexuals.com
upskirtlove.com
xxxsitereviews.com
seesexvideos.com
xxxpornlinks.net
sexsitedomains.com
myadultlinks.net
There are tons more, but my fingers are getting tired, so I'll stop here.
Notice he uses comments <-- keywords: --> and <-- description: --> in the HTML a number of times on the top/bottom of the page. He also uses <img src width=1 height=1 ALT="description:......."> to put more invisible text on the page.
He uses multiple CCBill accounts, including 603702, 620418, 603704, and many more (I guess he decided to use a different account for each site, for whatever reason).
DHDRevEx affiliate code: 107924
Porn Star Bucks: 17114
Verotel ID: 9804000000567825
Dollar 4 Babes: 103118
Gorgia Cash: 100189
ARS: 94164
Silvercash: 257472
Light Speed Girls: 39767
Maximum Cash: nkamat
Gorilla Cash: gt2103
Giga Cash: 156751
Epic Cash: fslfsl
Adult Lounge: 101419
Traffic Cash Gold: top10links
Sunny Dollars: 1364
Pimp Roll: pimp4753
Adult Players Club: hcfsl
Platinum Bucks: 1259
Top Bucks: 5776
..The list goes on.
BTW, you can't find the affiliate codes from looking at the source code. I was able to see the actual affiliate links using
http://web-sniffer.net/
Good news is only about 150 pages from each domain is indexed in Google, so far. The bad news is if a domain ranks for a key phrase, and positions above your page, then your page will be pushed a *few* pages down from all the above domains showing up above your link. Read the descriptions for all the listings and of course they're identical, except for the leading text which contains the domain name (I guess used to avoid being listed as similar pages).
EDIT: Added a few more info as I came across more stuff. Double check the affiliate IDs; since I extracted them from ref codes, I can't vouch for their complete accuracy.