Remember onething, this is not PTA who blocks the websites, this is actually PTCL which do this. PTA just regulates the Telecom affairs in the country and directs PTCL to do this. Blockage of porn site (5000 porn sites) was also carried out by PTCL (not by PTA). For porn sites, PTA had not requested PTCL. This was a good step by PTCL on its own.
For reopening the porn sites, Let me make you clear, that Pakistan have two gateway possessed by two different companies, The PTCL and Transworld. Porn sites were blocked by PTCL on its own (no direction from PTA), so Transworld kept it open.
ISPs like Wateen, Wi-Tribe, COMSATS, Nayatel and cellular networks (Mobilink, Ufone, Zong, Telenor & Warid) have their uplinks through both of these PTCL and Transworld. So, when PTCL blocked porn site in its network, these ISPs (Wateen, Wi-Tribe, Comsats, Nayatel and others) oppened these sites through Tranworld (country's gateway).
As PTCL had kept these sites blocked on its MMBB, EVO and other downlinks, so it has to loose a huge number of customers. A lot of customers disconnected their PTCL DSL connection and were shifted to other ISPs.
So PTCL had to reopen these porn sites.
PTCL team is working over opening of
www.youtube.com through HTTPS protocol.
Please follow my above request and paste the details here. This will help us to block the youtube fully.
Note: It's impossible to block all porn sites, as they very huge in number.