No, you're right. Its why CampBX isnt important. If they went to $500 it wouldnt effect the other markets at all.
If CBX went to $500 I'd move coins there and sell them, move fiat to my bank, then wire it back to bitfinex.
Hell, at that price you could just buy the coins thru localbitcoins.
Well yeah, but its like when rmbtb CNY went to 1500 the other day.. no other exchanges gave a fuck. Because they arent significant. Significance comes in the form of volume and trust.
Bitstamp is #1 in that I think. Followed by Gox.
Then maybe BTC-China and BTC-E.
CNY went to 1337.