6,000 Platinum! I'd like to know the source for that. If they all fly 5 times a year each BKK to ? (a very realistic minimum to maintain Platinum) and spent 2 hours in the F lounge there would be an average 9 of them (with guest?) in the F lounge at any one time. 18+ at peak times e.g. 10pm? I don't think so, I reckon the figure is more likely to be less than 600.
I have been told how many UK based Platinum there are, I can't recall the number but it was less than 30. That would not equate at all to 6,000 total.
Getting back to the thread question, as per paolo64, I used to see no more than 5 Gold on TG917 in economy so maybe 10 total and 0-1 Platinum.