I Googled but am still wondering why this is a good idea. A cat rescue FB page I follow has loads of adverts for people to adopt cats from the Mediterranean, North Africa and the Middle East. Some of these rescues operate centres in the UK as well as abroad, so they're not ignorant of the situation for cats here. Page after page of rescues saying they're inundated with kittens and unneutered adults, closed to new entries until cats are adopted or they find new people willing to foster them. My three closest rescues are looking after nearly 200 cats and kittens between them and these are small independents, not Cats Protection and the RSPCA.
Every imported stray means one home fewer for cats in UK rescues. What's the benefit? Why do they do it?