It's a bit more subtle than that. I have time for people past this initial stage, and lots of time for angel investments. But I don't have time to engage fully

It's a bit more subtle than that. I have time for people past this initial stage, and lots of time for angel investments. But I don't have time to engage fully with everyone who emails me. I simply get too much email and have too much to do for that to work out mathematically. So these tips are more about getting noticed. It's really just advice. If you don't do them will you be completely thrown out? No. I read pretty much everything and give it serious thought. But if you don't do them you're not putting your best foot forward. I also don't think I'm alone here, though I'm of course not speaking for anyone but myself. I suspect that if you did all these things you'd have a much higher conversion ratio, which ultimately will just save you a tremendous amount of time.