ESL has announced that as of February 14th, Shopify will no longer be contributing to the ESL Open prize pool. The prize pool will go down from $800 to $400 per cup (1st: $200, 2nd: $100, 3rd/4th: $50 each). Also, the semifinal rounds will be shortened to best-of-three series from best-of-five.
Also, ESL will look to allow more ESL Open lobby access for players who are looking to cast matches, as also push to release replay packs from the ESL Open Cups during the off-season period (not 100% as of yet).
Shopify's TLO also commented on the lapsing of the ESL Open sponsorship (TL;DR: we're sponsoring other things, not the open cups anymore):