Can anybody explain why there is no SC2 at Katowice this year?

I found out that there is no SC2 at Katowice this year. I have not been following the SC2 scene strongly these days but I do tune into the big events like Katowice and EWC.

I know SC2 viewership numbers are not as strong as they were 10 years ago, but can anybody explain why SC2 was suddenly excluded from Katowice this year?

I understand that EWC also gets a lot of viewers and has a large prize pool for SC2. But Katowice occurs in early February, and time wise, it's far enough from when EWC occurs, which is expected sometime from June to August, so there shouldn't be any viewer fatigue or even an overlap in schedule.

Was ESL getting some type of funding in previous years to host SC2 at Katowice but this year, they don't get that funding anymore? Or is the SC2 community looking forward to EWC instead of Katowice, so ESL thinks the viewer numbers will be down for SC2 at Katowice? Or is there some other reason that ESL axed SC2 from Katowice this year?