Trust vs newness of startup
Advantages of existing companies are trust. Disadvantages can be delayed.
Advantages of startups New and promotional. Disadvantages There is no trust.
From your description, we know that the old casino has a trust which cannot be found in a new casino, but they have disadvantages delayed the transaction. But for the trusty casino, they won't delay anything because that will relate to their reputations among the gamblers. They don't want to disappoint their members because of the delays in anything. But the new casino can have that, and they do not yet have a reputation, and that makes gamblers need to be careful when they choose the new casino.
The mere fact that reputable gambling casinos are always after their business' welfare, they will not allow anything bad to happen with their business. Unlike those new created ones which are still trying to be noticeable and trying to build good connections with their target gamblers. It's all about how they can gain trust as an advantage, which all the gambling owners are trying to established.
Getting trust review from the members or people will give them a big chance to gain more members to join with the gambling website, so their site will become bigger. That is what the new gambling site needed to get reputations, and they give the best services to their members by protecting the member's data and not give trouble for the members. Once they can gain trust, more gamblers will feel comfortable to stay with them and play for a long time.