Compatibility between Raspberry-Pi Zero and USB hubs does NOT seem to have anything to do with them being powered and amperage at all so far based on many user reports! It seems indeed instead depending on USB hub chipset compatibility: you need to have a hub that is "intelligent enough".. i.e. has a chip, able to manage downstream devices and not backfire power in case they are powered ones. Basically what is meant with "intelligent enough" is how the chipset is enumerating and forwarding to the OS and Drivers this information, is how good the chipset is checking the basic validity of bus transactions, etc.
Good chipsets so far seem to be F5U234 from Belkin and various from Terminus Technology
Refer to this compatibility list: RPi_Powered_USB_Hubs