Netflix is cheap, has a large selection, is available in several countries and its geo-block is easy to bypass with a Chrome plugin meaning you can get full selection from any country. There are also other streaming services in various countries. Not to mention the large number of countries iTunes Movies are available in. Obviously new releases can only be viewed in the cinema but if you really want to see something that's not too big of an ask - or you can wait a couple of months.
There are always people trying to justify piracy and although I disagree with it I can see their frustration at times but movies are incredibly convenient and cheap to access. Is there a 'valid' reason to use something like Popcorn Time?