There is a very particular reason as to the popularity of these sites. Ever since mankind turned to games for seeking entertainment, he has been a great fan of taking chances and seeking thrill. It has been for this reason that popular casinos all over the world have devoted so much money and space within their grounds to allow for these games. But that was then, in days of old when gaming world was restricted to within the confines of the walls of casinos. Slowly, with the turn of time, they spread over to casual arenas and common rooms. Then exploded the internet and everything changed.
The big turn:
There were many casual gamers that wanted to seek the thrill of these games but were always apprehensive in approaching the professional arena of brick and mortar casinos. They did not have the financial backing or the familiarity for these places. As the mode of entertainment shifted online, many gambling and slot sites opened up. They were open to all and almost always free to use. What you paid for was the actual games that had live dealers and other players. For temporary engagement and off season nights, it was still free.
Inspiration behind the games:
There were more slot sites than the ones that promoted gambling. There was a very specific reason behind this, contrary to poker and other games of the card family, slots could be customized and redone within a much larger scope. This provided something new to be had every time you would visit a site and thus offer greater chance of customer retention. In absence of which the business would dwindle down and wind up in no time. Additionally, the slot machines are free to play and are limited only by the number of tries that you can get turn. The chances of winning are also perceived to be more as in absence of other players; the user thinks they stand a better prospect of coming through. This keeps the player hooked.
How and where?
One can find such online sites easily, all you have to do is make a simple online search and you would be supplied with a list of both, present and upcoming sites. The membership is free and you are asked to play only if you have exceeded the free trial or are up in contention for a prize.