Thats where it upload the logs in gzip format and I found this link ( https :// tracking.intl.miui.com /track /spock )from the source file provided here. It's their official address, not selling to google at least.
The blog you referred is based on old findings, they have secured their servers and if they leak or steal any data, it will only damage their own brand reputation, something no big company would try to do, but every company tracks their devices, so yes imei, mac id, sim network, region, location, wifi, and other app logs will be stored in their database. Nothing unusual finding there. If you all suspect other app you can post about it.
