I think that these machines are the most popular and according to some online reports, the popularity of penny slots has grown immensely, because low limit players look for more and more entertainment. The number of players with a tight budget is absolutely rising and they are almost always looking for low-priced entertainment, wanting to have some good fun while gambling away $20.
The added value too with penny slots is that even though it may require only a penny to play, in most cases gamblers can play up to $100 a spin, betting dozens of credits on multiple lines. Thus, gamblers can with no trouble bet high or low depending on the situation of their bankroll.
In Australia, where Aristocrat Technologies (slot machine manufacturers) is based, it's said that there has been a dramatic shift from 5-cent slot machines to penny machines over the past five years. Did you know also that in Australia, it's estimated that about 80 percent of the slot machines in the country are penny slots.