I think FUP is fixed at 2 TB - and that's also on the higher end. Other ISPs in Pakistan aren't as liberal as PTCL.
Comcast (US) allows 1.2 TB (
https://www.xfinity.com/learn/internet-service/data),
AT&T does 1 TB for speeds less than 100 Mbps (
https://www.att.com/support/article/u-verse-high-speed-internet/KM1010099/) and unlimited for higher speeds.
Granted, there are lots of other ISPs in the first world which offer higher (or almost unlimited) data limits but they have acceptable usage policies. Torrents are choked there, you get complimentary police knockings on your doors for repeatedly and illegally downloading content (after ISPs issue you a few strikes), or it's just blocked altogether.
Also, the prices there are a bit more higher in absolute terms (even though relatively speaking, they may have cheaper internet). But point is - for this price point, and the fact that we don't get the police chasing us for downloading things, the networks will throttle you when they feel their systems are being abused.
Otherwise, pay for a corporate package.
Everyone loves unlimited. We just don't have the money nor resources.