If we resume gambling at any time due to free availability of credits then there will be no meaning of planning to gamble only for particular time then chances to limit gambling and from that we cannot avoid gambling addictions. I mean to say we should not modify our schedule of gambling just because of free availability of gambling.
Here we need to understand how our self control will be working in favour of us so that we can follow our scheduling of gambling all the times more strictly. When a gambler will remain strong with his self-control, he will be able to follow his scheduling of gambling like once per month or only on weekends regardless of whatever free giveaways he will be getting from gambling sites.
Some of that free giveaways usually have a strict rules like must xx times rollover and many else but yes it works to attract many gamblers out there.
For me, i usually gamble at night, because i live in asia and most of soccer match in europe play at night until morning in my timezone. That's why i usually gamble at night until morning.