Yes sportsbook is very interested, especially when the big leagues are running, there will be a lot of betting done by football fans who like to bet on football matches, for other sports I think it can be optional because not too many people like it but football is a different story, almost everyone likes football and if they bet on their favorite team it will provide user growth on playgram quickly.
Other sports like basketball, boxing, tennis etc have a huge audience as well. If playgram is going to implement sports betting, then it only makes sense to include 5-10 of the most in demand sports among gamblers
With the last EURO contest and the interest it got, I'll not be surprised if the team is planning something in the sports section.
5 to 10 sports that can be used as alternatives is not bad, in fact some people can take more choices for them to bet if it is paired in the casino, especially when it is a season break, people will get bored and spin other bets that they recognize or they know the team or the sport, it's a good move.
It should be in the plans to add a sportsbook, but we don't know what they're up to at the moment, hopefully playgram will hear about it, that would be great.