There are some guidelines that work. Especially when it can be automated. I used to reply to every person who sent me articles. Every time, without fail. But the quality is down sharply, the numbers are up, and the approach is cold.
All professions have a certain set of procedures.
Ways that things should be done for maximum results from the investment of time, money or effort. I outlined some in my last post. Online authors are no exception. Experience and practice can cut that time dramatically. Still, the time spent is miniscule compared to the value of a well written piece in front of a properly targeted audience.