Every 90 minutes you will be given the opportunity to claim the giveaway after which the timer starts all over again and the giveaway will last for month (30 days), and for each clain you get $0.01.
I did a little calculation and this was the result;
In a month (30 days) we have 43800 minutes,
43800 divided by 90 gives you 486.67. which means in a month if you're consistent and don't miss any claim you'll be able to claim the reward ~487 times, and for each claim you get $0.01, multiply reward by the total number of times you'll get $0.01 * 487 = $4.87 which in this case is approximately equal to the $5.
I don't think there will be anyone who would be willing to waste that much of his or her time just so that they can claim $5 giveaway.
You would be surprises on how many people will claim this and also find a way to abuse it. This may be a very small amount, for some people this is already a nice amount where they can something with it. If there are no requirements on the claiming, you can be 100% sure, that people will abuse it.
On a side note, anybody actively playing on the site and can recommend it? Looking for some other casinos to play at.