I have been keeping an eye on them too, along with DO, Linode, Vultr. If I remember correctly UpCloud has disabled HT due to Intel's security issues, so all of their Core are really Single Core and not a Single Thread.

They seems to be working hard [1] with 10! more DC planned in 2020. The entire Hosting market is growing like crazy!

[1] https://upcloud.com/blog/upcloud-secures-18-million-funding-...