Agreed.
No audit...then we don't know.
Have you seen an audit for SwissCows' Teleguard?
I've been testing it for a few days now, after a comment about it here.
They claim to not store your chats, they're deleted after delivery. To sync a new device requires an encrypted backup from an existing device.
I've tested this by restoring a backup from yesterday to sync a new device, and it only has data from yesterday.
That said, I really don't know how trustworthy they are.
Preach!
These are people who can't be bothered to write things down, because that takes effort.
Pretty much anyone can read at least 4x faster than someone can speak.
There's a place for video, 98% of YouTube isn't it.