Originally Posted by
somkiat
160.000 miles within 2 years result in roughly 9 ( F ) - returns FRA - BKK , costing you about 50.000 USD , depending on circumstances .
But if my calculations are correct, one could obtain it for as little as about 17,000 USD on a different route, though that would be slumming it in C.
If you're primarily flying TG in F, then I could see that you wouldn't notice much difference being Platinum vs. Gold vs. nothing. For some of us though that fly mostly economy, the step up to Platinum ought to be a big difference.