Why build up services?
Samsung does and all you get is two or three slightly different copies of each app. It's not as if they're particularly loved anyway, people will use what they're already using.
I suppose Xiaomi and OnePlus' Chinese market prices let them generate profit while they build up momentum in the West. I still wouldn't buy one though, if it goes wrong you're stuck with an expensive brick.
What I would look at are the European rebadgers like Wileyfox and bq, you've got support that way. (And official CM with Wileyfox.)
Biting the hand that feeds IT
