It's indeed a strange fact that this cable type seems to be the only micro-a equipped cable type available at all.

I would like to know what the purpose of that cable is as the micro-A to standard-A would only make sense if you'd want to connect an OTG device running host mode to another host. This is generally a very bad idea as you'd at least shorten both devices power supplies.

Did anyone figure out what this cable was intended to be used for?