I've seen this one around. I think it could be helpful, but it's pretty bad.
Maybe a better way for it to behave would be to wait to be summoned, by the author or a blind person.
Still though, blind people have their own screen readers. It feels like less of an attempt to be useful, and more of a thinly-veiled cash grab. But maybe, just maybe, I'm just an arsehole.
I see it as cash grab, because it's incredibly bad and super annoying.