I figured something like this would exist, but I don't think it's very useful.
I've walked the dark path of trying to implement "pickup artist" material(can't imagine that'll be received well), and I can say that:
A) an objective approach works (if you're humble and willing to recognize/adjust for failure)
B) there's a torrent of snake oil out there
C) you learn a lot when you try this stuff. A lot.
A lot of that material is laughably bad, but the general formula of "know your value, be confident and unapologetic about what you want, be ready to accept 'no' quickly and gracefully" is the buried gold. Maybe it's just me but grinding through failure after failure after failure taught me those things.
You can't buy them, and if you don't have them, it shows in your behavior.
You can't have someone Cyrano de Bergerac your way into a date by behaving that way, because in the end the girl shows up and meets you.
Furthermore, the proposition that this is a service for people who don't have time to send messages in these apps doesn't hold water. Not having the time to respond promptly is an asset. Bailing on some conversations is an asset. You're a busy man with a lot going on, not a desperate man glued to every prospect.
That's my two cents.