I think Rollbit will do that gradually because to be a sponsor of an elite team in the Premier League it has to be with big money in addition to elite clubs having long contracts with their sponsors first.
Big clubs have their contracts with other companies for advertisement already and Rollbit, if want to do sponsorship or partnership with big clubs, will have no other choices than waiting for current contract expiration. It takes time and UK government, Premier League might have stricter Act and regulations on Gambling advertisements in next two years.
At least we can see the new face of Rollbit in Premier League matches this will obviously attract a lot of audience to visit Rollbit casinos, plus crypto is getting more popular around the world it could be that with the impact of the US election the increase in adoption is much greater.
They have appearances in Serie A with Napoli too, not only in Premier League. Going with Napoli and Southampton in two big leagues are good first steps of Rollbit to advertise their brands and expand their customer base to more people, in more nations.
This year, with the US President Election, and possible big change in policies there after the election, if Bitcoin and cryptocurrency industry get more friendly regulation next four years, it's massive for everyone who engage in this industry.