I last applied for jobs several years ago, and there are still dozens of companies I've not gotten a rejection from. A "fire and forget" strategy of sending out hundreds or thousands of applications is the only thing that makes sense to do if you're not getting a job through networking.
I got 150+ applications per day.
At some point, you just have to close the window. I can only realistically do 10/25 résumé per day and still do my job.
All most all hiring has a strong element of luck. I've hired really good engineers that can't write a resume or aren't self promoting enough in an interview and they seem kinda flat. But they roll in and make good decisions, good products, good documentation and they are easy to work with.
If I could, I'd talk to everyone on the phone for a few minutes to get a feel but I can't do that either.
Adding an application-cost to the dynamic seems to be one sensible approach to applicant-spamming.
It's also why reducing costs of communications can backfire in all kinds of obnoxious ways. I remember getting my first email account, nearly forty years ago now, and being able to communicate near instantaneously, and with no cost, to ... a very, very, very small handful of people.
Even in the corporate world of the early 1990s, email addresses were sufficiently rarified that for the most part you'd communicate with a few colleagues at the same firm, and perhaps some contacts at other companies, if you were in a technical position (as I was at the time).
I can distinctly recall being in a bookstore in the late 1990s the first time I heard a mother talking with her daughter about a new friend the daughter had made, and the mother asking if the daughter had shared her email address.
Other than cost imposition, the best suggestion I've had for information overload is to have a cheap, unbiased, low-cost, no-regrets information rejection capability.
Earlier mentions: <https://news.ycombinator.com/item?id=37440218> and <https://news.ycombinator.com/item?id=22208255>.
Of course, for established contacts you'd want to override that.