True. But then you have to deploy and maintain that CNN yourself.

The value prop is similar to, say, Twilio. Though, arguably, it's easier to run your own pre-trained CNN than it is to replicate the telephony, VoIP, and video conferencing stuff Twilio provides.

Also, presumably Google is hoping that they can continue to train and improve their CNN so that it's always just a little better than the best free-to-download ones.