Both Clicksia and Incentria were closed a few days ago.
You can read more about it here
Now there are not many old PTCs left, a few are Wordlinx, Clixsense, Neobux, Buxp and PPlinx. But also the DonkeyMails sites like Jillsclickcorner etc.
It will be interesting to see how this change will affect other sites, where will all the advertisers go from Clicksia and Incentria? They were very good for sign-ups, and the traffic was decent.
What do you think?