There are lots of gamblers out there that just do not have access to land based casinos, and for varying reasons.  They might had disabilities or health issues that makes it difficult to leave the house, or maybe the nearest land based casino is over an hour away.  This is where online casinos come into play as it helps the gamblers that cannot go to land based casinos.  All you need is internet access, the legal right to use a online casino and a method to fund your deposit.  There are lots of casino players that prefer online casinos to land based casinos as they prefer not to interact with other gamblers, and when you add a healthy casino bonus to the mix, the online casinos become a very popular alternative.  The Las Vegas casinos have actually been noticing the growth of the online casinos for a while, and they are now beginning to believe that they are here to stay, despite the legalities.  This has not prompted a few online casino license request through the Nevada gambling commission, which is actually a good thing for Vegas casinos as the online variety have to partner up with land based casinos.