I agree with Ian. As many of you know I have branched out. I started with DividendMails, then added in order GoudaSearch.com, ExitPaid.com, SearchBotz.com and finally Search4Search.com. The last being a PTR site but I thought I would try something different being that it only sends out search links and the members only earn advertising to send out their own search links. I knew this wouldnt be a HUGE membership based site but to my surprise since I have opened I have sold more advertising there then I have for DividendMails for the last 4 months!
You have to find a niche...something that isnt filled and Lord knows there are too many PTR sites all doing about the same thing.
SearchBotz has been very successful as well both for myself and for the members because I pretty much knew by reading posts that people who joined search engine affiliate programs wanted to join the ones with the lowest payout, that had a fair percentage for earnings and were paying. So I decided to offer monthly payouts with no minimum and in the two weeks or so we have been open we have 525 (at the time of this post) members and some earnings very well at over $20. I knew if I offered all the things people wanted they would join and stay plus spread the word and thats happening.
The PTR industry just is tapped out unless you come up with a niche ...something different that nobody else has...but at this point thats pretty difficult since everyone is doing almost the same thing. Plus like Ian said the sites are pretty generic. As the saying goes to make $$ you have to spend $$ as Ian also can attest to because I had him alter my scripts at SearchBotz and of course had to pay him for it

...a very fair price I might add. If you dont know HTML then pay someone who does to change what the sites look like. Look at the big business sites and see how their sites are laid out. I can tell you they arent FULL of search affiliate boxes pop ups TONS of images so the page loads like tomorrow for those on dial up etc etc. These sites are a business and if you want to attract advertisers then you have to spend $$ yourself on advertising OUTSIDE of the PTR industry. Pay to have a professional site like Verica submit your site to the search engines...etc etc. You cant have a nickel and dime site and expect to make a dollar it doesnt work that way...well I can think of one exception ClickityCash and 1Heluva...they need HTML redesign BIG time but they are doing well.
Anyways the bottom line is the webmasters if they are serious better be prepared to spend some $$ to have a good site and I dont just mean the scripts I mean the design too. Thats just my 2...uumm well maybe 4 cents worth