I am interested in creating my own dice/gambling site (like Primedice and Just-Dice) and my own altcoin exchange (like Cryptsy and Poloniex). Does anyone know how passive such sites are? For example, writing a novel is passive income because once you write it and find a publisher, you don't need to do any work for the money to keep rolling in. Another type of passive income is a rental property - especially if you have a property manager, and automated trading where you write the trading bot and it does all the trading for you. Most large businesses also generate passive income for their owners.
So how passive is a dice site/altcoin exchange? Could I write a site using PHP and Javascript, announce it here on the forums, and then leave it alone and still get money? Since it would all be automated and the site will automatically skim the profits from the house edge or trading fees, am I correct in assuming that I won't need to do anything further other than maybe check to see how it's going every once in a while?
It all depends on how much traffic the site gets.
PrimeDice for example most likely earns up to a 100 btc a month, easily.
Altcoin exchanges need to be very secure as you could deal with 1000s of BTC too.
You would need to constantly work with the site to ensure it is updated and such.