So many ways you can do that, you can start a signature campaign on this forum and try to make your presence known by doing some giveaways also to attract new players to your site.
One thing is common. The more you work hard - the more your business flourish.
I know a small business which is not a gambling business. But a small business out of reach of common people. But they are so good that they only want a few people to visit and they want to maintain their standards at any cost. And they are flourishing.
It depends on the target customers of the business itself.
Like for example, what you said, that business is targeting few people, but maybe they are quality customers.
And they are paying good price to be their valuable customers.
However, in gambling, as much as possible you would want to attract small or big rollers at the same time.
This will give you sustenance of the business, otherwise, you would find hard surviving.
I fully support what you say, some think that certain casinos are very good because most of their customers are whales or those who consider whales, in fact for me casinos live on any type of customers, whether they are whales or normal customers who usually spend little , medium or a lot of money in casinos, for me they should all have the same importance, hence where VIP clients are created. but given the tremendous competition that currently exists, it is necessary to rely on any type of marketing and whatever attracts attention, so everyone should treat each other with the same affection and respect so that they always frequent the site.