I don't use Haier products but a similar thing happened with Chamberlain when they blocked the MyQ integration even though it was using the legitimate API and not breaking any rules. No attempt to work with anyone in the HA community at all, just shut everything down.
On one hand, this means projects like Home Assistant are getting popular enough to have enough usage to effect these companies. So that's great! In the long term, we'll all figure out solutions, but in the short term it feels like an increasing fight between corporate and open-source control over smart devices.
Namecheap API works just fine with Certbot DNS challenges for me, FWIW.