I don't know what a "gambling bank" is, but i've never heard any allegations that Neteller is anything other than a legitimate online payment service, in the same market as Paypal, except that Paypal doesn't do gaming. I've not heard of any hotels accepting these services, but
apparently you can get a Neteller debit card. However, it doesn't appear to be Visa- or MasterCard-branded, so i'm not sure where it would be accepted, and their fee schedule looks outrageous at least by US standards.