It looks like this one
www.dzlatan.pw/get_activity.php but the only difference is OP's has ads. Anyways it would be still helpful to check the potential activity in 2 or more activity checkers. Is there anymore sites like this ?
There is a site I created, bctalkaccountpricer.info which not only gets your potential activity but also estimates the price of your account.
That's interesting man. Gonna check that site