Yes you are quite correct the gay scene in Amsterdam is now appalling. I used to visit from London every month for the last 10 years or so.
There used to be 5 or 6 Houses with Boys but now there is only one left, the Club 21.
The remainder have closed due to poor management, boys on drugs,etc. etc.
Additionally, all the gay bars that had rent available have closed (Festival, Music Box etc).
The largest Gay hotel (The Aero) went hetero last year and was closed all this year for re-furbishment. I doubt it will re-open as a gay Hotel.
All this is partly due to the internet but perhaps a lot is down to the expanding scene in London, and the subsequent lack of UK visitors who started to use the cheap Airlines a few years ago.
I, for one,now rarely visit Amsteram but save the money for a long (2 month+) stay in Thailand
This actually costs me far less than 12 long weekends in Amsterdam and the whole scene is streets ahead.
I wish I had made that decision 5 years ago!
Gerefan