The challenge with the online gambling industry is that people can access sites in countries where gambling is illegal.
Therefore the key to gaining a bank’s support is demonstrating a tight control framework and skilled, experienced staff, so that the bank can be confident their accounts or lending facilities won’t be used to break the law in these nations.
A straightforward conversation with your existing bank on this subject will help get you clarity on what you need to do to get them comfortable.
Do note however, that not all banks’ appetites in this space is the same