cheers Tod, I think there is alot of interpretation going on as early days, should all settle down. If we look at other visa extensions costing 1900tb they do not follow the cost of the visa itself. However, you do have it in writting there!
From what I read it's a five year multi entry visa with a maximum stay, just like the MTV, I don't read it says 10,000tb each year, you re-enter on the same visa until it's no longer valid, question is if you leave withing the 180 days and re-enter, what stamp will you get or will they deduct days used!
On the attachment from Tod it says extendable once per stay, after 360 days must leave for at least one day and renter to reset for another 180+180 days, so in essence other than 1 day you can stay 360 days for 5 years. Understand about the TAX rules.