Members of Paid To Click and Paid To Read sites earn money by clicking on ads and viewed the advertiser's site for a specific amount of time (usually 7-30 seconds).  There are many of these sites around the Internet.

The following company produces software that allows anyone to build a PTC earnings site.  Scanning the net I found 133 such sites using the software package from the company below.

http://www.illusive-web.com

Most of these sites have memberships in the 500-4,000 range and pay around $0.0002 for each site visited.  Some pay higher and some less.  You should not expect to make a lot from these sites, but you can earn a little extra cash if you have the time.

Sites (page 3):

http://www.clickingforprofits.com
http://www.pickupthecent.com
http://www.starclicker.com
http://www.clicksgonewild.com
http://www.realestaterichesptc.com
http://www.badassdogclix.com
http://www.funtasticptc.com
http://www.hahacashme.com
http://www.supergpt.com
http://www.adjazz.com
http://www.thepaidto.com
http://www.leopardsclicks.com
http://www.bulldogsclicks.com
http://www.princessclicks.com
http://www.hoppinhits.com
http://www.dinolinks.com
http://www.jingleclick.com
http://www.clickingrewards.com
http://www.mckenzieclicks.com
http://www.mannalinks.com
http://www.sheriffonline.com
http://www.fairysurfer.com
http://www.freedomclicks.com
http://www.activehits4u.com
http://www.moneykisses.com
http://www.gptlinks.com
http://www.hotcashlinks.com
http://www.hitsnow.org
http://www.franchise-clicks.com
http://www.bombclick.com
http://www.popularhits.com
http://www.primeclicks.net
http://www.cre4tivemail.com
http://www.cashtreasure.com
http://www.kittyandcompany.net
http://www.clickworks.us
http://www.spidermanlinks.info
http://www.linkweb.biz
http://www.moms-little-helper.com
http://www.clickfactory.us
http://www.hotptc.biz
http://www.trafficlinks.biz
http://www.tornadoofdollar.org