A friend who works in business says that she has been hearing a lot of polite commands worded as e.g. "thanks to ask any questions at the end of the presentation" (she has also seen this written a few times, so it isn't just spoken).
I find this surprising since I would have avoided the infinitive here ("thanks for asking") or I would have turned the "thanks" into a verb ("I'll thank you to ask").
For context, she works in a very international setting, but has heard this turn of phrase only from USAmericans.
Is this a "correct" turn of phrase? how widespread is it? how recent is it? can anyone find examples in established writing?