At least, casino know where they can promote their business. If they found one place to be the right place to promote, they will spend more money to have an interesting promotion.
Twitter will be a good place to promote many offers. Many people use Twitter to search for something. But casino will not just use one social media to promote their casinos. You can find a complete of Betfury's social media in the bottom page on the site. You can also see Betfury have Tiktok page.
A casino knows where to promote its site, and its popularity will increase. Since there are currently a large number of users on Twitter, Instagram, Facebook, and YouTube, casino authorities are focusing on these social media platforms. Although Reddit is popular, most users cannot use it, especially due to the limitations of the users. Therefore, casino authorities do not give much importance to running their promotions on Reddit.