Both reputable and none reputable casinos get hacked at some point and this goes a long way to show how vonurable one can be when it come to being asked to frequently input your log in details at all time because you may not be aware of any malware that may attack your device to steal your log in information.
So for sure, reputable casinos also get hacked sometimes, and also even the hack of user accounts may not result from the site being hacked itself but also those hacks that happens to players accounts who choose to input the log in detail and being follow up by attacker at all time
The hacker will target the reputed casino by getting money from the competitor of the casino market.The reputed casino is not too hard to target like the non reputed casinos,because the security of the non reputed new casino will be low.When the reputed casino get a minor attack of the hack,it will be spread easily,this happened to the stake.com.But the Stake had get all his assets except one coin,So the stake again proved his legitimacy and the supremacy in just 24 hours of time.They also not delay the payment of the forum participants on that week.By this Stake proving their No 1 position in the world gambling market.