How do researchers send unsolicited emails asking for feedback on their works? I wonder how a researcher send an unsolicited email to another one asking for feedback to their work. I guess it will be something like this?

Hello Dr. X
To introduce myself, I am Y, in institute Z. I'm sorry if this email is not convenient at this time, but my work about A is highly relevant to your work in B, so I think it will be interesting to you too. If possible, can you take a look at it and tell me what you think? Here is the link: Human interaction with cats
Thank you for your reading, hope you enjoy it.

I wonder if the summary/abstract should be included in the email too, since the principle for asking good question is to show everything you know about it. Maybe it's not necessary, since the title of the link should prove its interestingness nevertheless? I'd like to have your confirm.
I'm also interested in the case where Y has no Z, and the link is just a collection of observations posted in a blog, not a full paper with proper citation and literary review. It is possible that the observations may have been covered in the field, but Y isn't aware of that yet.
I also think that if the link is interesting enough, then putting a tracking method in there is fine too? Even if they finds out, they wouldn't feel insulted either, because they find that the link is indeed interesting.

Related:
• Is it appropriate (as a PhD student) to email other researchers asking about some details in their papers?
• Is it appropriate to drop by another university's professor's lecture to talk about research afterwards?
• What are the strategies for getting feedback on articles?
The real answer is that they don't. I'm sorry, but I can't slice it any other way. You would need all the planets to align in order to receive an answer after such an email. You are asking someone who doesn't know you and who is probably very busy (like all academics) to provide you a big favor for nothing in return. Because let's be honest, giving feedback on someone else's work is taxing. The best case scenario is that you get very vague and superficial feedback about the first page of your paper.

Instead, ask your colleagues, or people you have already built a rapport with (an advisor or former advisor, a collaborator...). Or do it the hard way and submit it for publication. You will get (anonymous) feedback. But make sure first that your paper is close to being ready for publication, because you don't want a desk rejection, and you don't want to be known as that person who wastes referees' time by submitting drafts.