While some online casinos offer these as a no deposit bonus (meaning you don’t have to part with any money), there are others which do require one (usually a nominal stake often no more than £5).
It is the case, that the bigger online casinos have deposit bonuses because these are often the most established and as a result, the most trusted and respected. Furthermore, the required minimum deposit basically acts as leverage to then equip you with what is usually quite a generous package.
This often includes free spins, though it can also have a matched deposit as well – again usually the case with the major online casinos.
Deposit free spins compared to no deposit free spins make absolutely no difference at all to the payout chances with a slot from a player perspective because each slot is still programmed exactly the same.
Slots cannot differentiate between a player who has free spins based on a deposit and one who hasn’t, ultimately it comes down to luck and the precise moment that a player initiates the start button.
The rest is down to the mechanics of the slot and the RNG (Random Number Generator) as to whether the slot pays out or not and how much. Volatility levels of the slot also come into it as well, with regards as to whether a free spin will work or not.
In connection to this, some online casinos may have a stipulation as to the slots that you can use free spins on, based on whether they were issued on a deposit or no deposit basis.
High volatility slots are slots which payout infrequently though in large amounts, while low volatility slots issue winnings in low amounts on a fairly regular basis. This means that online casinos could restrict no deposit free spins players to slots which fall in one of those categories, based on their strategy and forecast models.
Most online casinos issue between 10 and 30 free spins depending on a number of factors, such as how big a name the casino is, what else makes up the welcome package and whether it was a deposit or no deposit bonus.
This means that the law of averages would dictate that if a player had 30 free spins on a deposit basis, that player would get paid out at least once on a low volatility slot.
As such, it might work out, for the duration of those 30 spins, the player gets just less than their stake back, but by that point, the slot has done enough to make you want to deposit more to either stay on that particular slot or try another, perhaps higher volatility one.
A keen researcher in the development of methods and theories for computer sciences. A lover of algorithms and mathematical computation. Consultant to online slots software companies and a player in my spare time.