Last week an iTunes TV show menu suddenly started showing up on international Apple TVs, didn't work, and subsequently disappeared. This week iTunes Match suddenly started showing up for international iTunes users, didn't work, and Apple subsequently offered refunds to those who'd tried to purchase it.
So, we'd suggest waiting until a) Apple makes an official announcement about iTunes Match in your country, or b) significant reports come in of it actually working, before c) you give them any money for it.
Whether or not Apple is planning to officially launch iTunes TV shows and iTunes Match in more regions and someone accidentally lent on the big red "launch" lever at iCloud central a tad early -- twice -- or there's some stranger problem going on is uncertain.
International licensing agreements are complex. Cloud services are complex. But false starts and pull backs seem decidedly un-Apple-like.
Here's hoping iTunes gets their international launches back in order, and officially out the door, asap. If you saw either the here-today-gone-tomorrow TV show menu on Apple TV, or tried and failed to buy iTunes Match outside the US and Brazil, let us know in the comments below.