Earlier quoted context omitted.
This sounds as fake as "marketing-speak". There's nothing wrong with asking "Please do " in the English language, it's plenty polite.
It's not marketing speak. It's getting off on the right foot by saying you like the person's work. Then it's asking more carefully if they've considered it before, in case they have and decided against or weren't able to. Then it's saying you'd appreciate it rather than you require it. Just saying 'please do X' sounds like an email I'd get from a German who doesn't know English very well. It's grammatically correct b…
I'm Dutch speaker, we're known to be very direct, but I too believe adding "Please" in front of a request does not per se make it more polite. Another example that bothers me quite a lot is adding "Thanks" to a request without awaiting a reply. Writing "Can you please do xyz? Thanks" makes it come over as an instruction instead of a request, even though the author may have had the best intentions (express his gratitude). Or maybe I'm just overly sensitive ;)