Today, When I wake up and opened upbux.com that was the best ptc website, I was shocked that it is no more alive because last time paypal limited their account due to activity(Actually fraud words to eat someone's money).
This is an absolutely bad time for Golden and Ultimate members who had invested thousands of $$$. Now, the admin of upbux(I think he is an honest person) said that if paypal re opens their account then they will come back.
You can also check all other paypal frauds here in detail.
[Update] An invester has contacted me and he told that he had invested 2500$ and his total balance was 4500 $ that has been eaten by upbux admin
[Update] upbux.com is finally closed. Good bye upbux.com