Apparently this is a fully technically-oriented conference, quite unlike OSCAL, held in Kiev during 10-11 Oct. I can’t go because uni.
Got an email from these guys, but waited until the T&C page actually had terms and conditions. The CFP is still open and reimbursements are available. There’s also a 10% coupon code for the ticket, but I don’t know if the website checks the name for ETH contributions: ETHCONTRIBUTOR. AFAIK this one is available up to today, so hurry up.