It's been a couple months since I set it up, but as I recall Amplifi did not require an account to set up your mesh.

It offered an optional "cloud" account system for remote administration (such as giving guest access when you are away or rebooting your mesh from your phone when your guest complains about the network not working, and so forth), but did not require it.

Wireless performance isn't great (20$ clunky china routers are usually faster), SXTsq that always slowed down horribly after few weeks of uptime, hAP Lite firmware that died (had to be reflashed from netboot, config gone), many software problems with SXT LTE6 (stopped working after upgrade, still broken after downgrade, mysteriously after hour of flashing various versions it suddenly started working again. Incoming voice call to modem SIM card just breaks connection, and it never fixes itself automatically, you need to manually down/up interface. I now fear touching anything in this installation at all).