I wonder how many people will be invited or register to join in the conference because it seems, it will bigger than we can imagine here even in the article says it's over 1000 people will attend Crypto Games Conference 2019.
I think you don't need an invitation to attend this conference. All you need is to buy a ticket for either 50 or 250 EURO
The price is not that high compared to what you need to spend on plane tickets and hotel, so the attendance is affordable for people from crypto gambling industry, the question is do they need going there? What can be attractive there apart from parties and complimentary drinks? I mean, do we really need such conferences in the era of Internet? Maybe that's why only a few familiar names are there among the participants.