Why do some mac-addresses repeat so often?

This example in particular (58-2C-80-13-92-63) is a USB Ethernet chip made by Huawei. Looks like they're being lazy and reusing the MAC. Examples from Google:

[50413.229125] cdc_ether 2-1:1.0: eth1: register 'cdc_ether' at usb-0000:00:1d.7-1, CDC Ethernet Device, 58:2c:80:13:92:63

…

[  122.660069] huawei_cdc_ncm 3-3:1.1 wwan0: register 'huawei_cdc_ncm' at usb-0000:00:14.0-3, Huawei CDC NCM device, 58:2c:80:13:92:63

The others could also be a case of VMs being passed around. But the most likely explanation (as others have said) is that it's cheap hardware.

To suss this out, check to see whether the MAC is (marked as) globally unique or locally administered: https://en.wikipedia.org/wiki/MAC_address#Address_details

The address 58:2c:80:13:92:63 in theory should be globally unique:

0x58 → 1011000

But MACs from VMs (e.g. 58:2c:80:13:92:63) won't be:

0x52 → 1010010