I found this page that explains it a little more...Why are they not supported but the others are supported?
Broadcastify-Calls
From The RadioReference Wiki
Broadcastify Calls is a high capacity service that ingests radio system calls.
Broadcastify Calls is different from regular broadcastify feeds as the calls platform captures every single call on a conventional or trunked system, as individual call files, and makes those calls available[1] in real time and in archives. The Broadcastify Calls platform is not intended to replace regular Broadcastify audio streams at this time, but to supplement them, and we will eventually create Broadcastify audio streams from the Broadcastify Calls platform.
Broadcastify Calls makes available to call ingest providers ALL calls they send to us, but limits public access to calls covered by our Feed Provider Terms of Service
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