On SheWrites author Garine Issas posted ". . . THAT TIME A FAMOUS WRITER ANSWERED MY EMAIL!: GETTING ENDORSEMENTS FOR YOUR DEBUT NOVEL" An article on the rejections and successes when requesting a "blurbs."
It is a worthwhile read; it gives helpful suggestions on how to go about getting blurbs and what not to do when it doesn't; yup, it's a balancing act.
Glad I read it, there are people who I gave copies of the first 100 pages of my book, months ago, to get some feedback, "Oh yes, I would love to read it" they said, and then... then... then... nothing. Except for my nephew Carlo, who gave me significant and constructive comments.
Now I know I am not the only one ignored, most of all know not to take it so hard when authors I know will not give me a blurb and also how it feels when I am asked for blurbs and don't give one; ouch.