Maybe the subscriber numbers are lower in Asia and so they want to tease people. Meanwhile people in the west just subscribe and moan. I don't know. But it's a shitty move.
Different regions get different content, different prices, and different release dates for all sorts of things. It's really not surprising at all.
Not to mention, it's different people setting up PS+ for those regions, and the publishers have different goals. A franchise that already sells well here may need a boost there, etc. I fail to see how it's 'shitty' for anyone, really.
It's not that they don't care, it's that they don't have to. From a company's perspective, why give away bigger games for free to entice people to get PS+ when the subscriber numbers are so strong they don't need to?
It's also possible they're dealing with different numbers. Sony has to work out the details with each publisher, and like I said above, a publisher may be unwilling to put a franchise on PS+ in the West because it's already selling well/ popular, but is looking for a boost in Asia. Or, it may not be so cut and dry and they simply may want more money in the West, putting it out of budget for the people planning the entire PS+ lineup.