upper kettle
I posted in general channel asking about this at the below link:
Now that I am home to test, it seems I really can use these voices. I gave up a smidge of characters to demonstrate with a voice created by the reader-app that that was added and directly exceeds my 30 slots.
If 11labs knows about this, and this is allowed despite exceeding my voice slot limit — please let me know! I don't want to get my account in trouble but would otherwise happily try to find uses for voices and make more in this manner if its allowed.