I originally purchased J class tickets (flew on LX from ZRH to BKK and codeshare TG flight back), so it was a lot cheaper than buying first or full fare business on Thai. I would still say it was good value for money.

In relaiton to miles, I actually did not get triple miles on the BKK-ZRH (for BD, you get x2 when you fly business and x3 for first). I have sent my boarding pass to the bmi Diamond Club asking them to credit extra miles as I paid for this upgrade. The same thing happened last year and they did give me extra miles, so I am hoping this would happen again.

Interestingly, I also did paid upgrade from Y to C from Phuket and Bangkok (1500 THB), and double miles were credited for this leg.