I guess that means Dennis Hoff should shut it down even though it has made him millions. Clearly it is a failure.
I've never heard of or have any idea what the Bunny Ranch is?
Using a currency is not only about buying tangible products, it is about buying services too.
You see members here hiring for design work, program code, advertising, domain names, voucher codes... These are real business activities and bitcoin is USED as a payment system. The products are usually digital goods because shipping a physical product is expensive.
I forgot to mentioned all the people transacting with it here. People are using it, just not to the level you want. As I said above, this will chnage over time.