From the documentation, services are intended to be an overview or snapshot of the client, if you like.
Since we can link assets to services (which populates networks and locations), what about being able to link licences? Then we could enter items the client is buying on a monthly basis (anti-virus) and termed, for a lack of a better word, services to a service entry, allowing the service to hold more info.
On a side note, I haven't found how to get URLs into services (I'm looking at this: https://docs.itflow.org/services). I'm guessing it's populated from somewhere, but I have a URI in an asset for example, but that's not being pulled through.