I agree that it's ridiculous that they are removing the split payment program without a proper replacement prepared. However, I think I have an idea why they are doing so based off of personal experience with the program. We worked as co-hosts on our parents' Airbnb, and we were supposed to be receiving a 25% payout for each stay. However, for every future stay, and I do mean EVERY stay, the projected payout was significantly below 25%. The strange part was every single stay, the projected payout was a different percentage, 13%, 19%, 16%, 11%... it seemed completely random, but it was NEVER 25%.
I was SO frustrated by this and did everything I possibly could to get resolution. I called customer service multiple times, I complained on all of Airbnb's social media channels, I even commented on Airbnb's CEO's personal Twitter page begging for him to get someone to help me lol.
Bottom line- they said it was a bug and they didn't know when they would be able to fix it. Their solution? Disconnect our payment credentials from my parents' account, and have them pay us directly. I was furious and couldn't believe this was their idea of customer service, but this was honestly the answer I received. Their tech team simply couldn't figure out a fix.
That was 3 weeks ago. Maybe it's just a coincidence, but I don't think so. My gut is that they were having too many issues with the service and decided to just cut their losses until they figure out a solution.