I will launch my first casino in a few months and I was curious how do you advertise it? How much bankroll you had when you opened your first casino? Have you learned from your mistakes and if yes, what mistakes cost you a lot of money?
One of the popular ways to advertise your casino on this forum is through signature campaign (like most users suggested). Im not a casino owner so I dont have idea on how much bankroll is needed or enough for a starter but I think the more budget you have is obviously the better. You need to have a plan on how you can maket effectively your casino to attract many gamblers. It can help if you create an account on different social media platforms to spread the word.
A casino needs a bankroll size which allows them to pay gamblers accordingly, considering they can be extremely lucky agaisnt the house on short run. And that is why casinos set a fixed maximum bet size allowed, so it doesn't get out of their control. For a small casino without much money at bank, this bet size limit should be really low.
As the house makes progress, increase its customers' base and popularity through ads and promotions, the bankroll will increase as well, so they will be able to let gamblers bet more money per bet.
Money management is one of the most important aspects a casino owner should be attentive to. If he fails on this field, his reputation is gone forever, being justifiably labeled as scammer.
So its safe to assume there will only be few that will play in the new casino and the bankroll could just be as low as 10BTC or this could already be big enough. There were casinos marketing here in bitcointalk that died actually.
I can name Coindragon for example that did a signature campaign but eventually they shut down. I think the platform has to be innovative also before they can thrive. If the casino has nothing new to offer like exciting new games, interface or free spins its going to struggle in competition.