I notice too the limited events which is only focus on major leagues on each sports. I’m betting few bets on sports especially on popular league only so I don’t have much concerns on the limited offer as long as my favorites is available.
They might offer a promotion that will show case their new sportsbook such as free bets rewards on game and rounds board for a prediction contest.
Anyway I will be happy if they will drop some random free bets for users that wager X amount per week.
People mostly follow and watch matches, events in biggest leagues and tournaments then they have more knowledge about those leagues and tournaments, clubs and players for more easily make their bet decisions. Casinos know about this popular habit of their users and they surely have to spend most of their resources from product developments, event host to marketing for those biggest ones.
It is a right approach for maximizing potential income for their business and it's the only way to maintain their business revenue and to survive in this highly competitive gambling industry in long term.