Find another btc PTC site and mimic the features you find most relevant or important. I earn a little bit at Dollarrewardz.com, but I cannot say there aren't better sites. They pay directly to a btc wallet or issue BTC-e codes, among other payout methods.
I may actually looking in to this.
What ways could I develop this in to a bitcoin PTC/GPT site
http://paid-tasks.comI have implemented a wheel of fortune and also a lottery ticket system but I would like your suggestions on how I can improve it to become more of a bitcoin environment.
If I were you I would invest changing the design of your website, it looks so old.
Maybe you can check where are your users coming from and if you have lots of non-US then you may include another languages.
I am going to do a whole theme revamp, so if you like what you see now, wait to theme i redone.
Thanks for your advice both of you!