It's beginning to sound as if it is a different decision based on whether it is a "new" indie author or a "new" author with an established publisher.
I'll be the first to admit that I do have a different thought process between the two above. I'm more likely to try a free or low priced book (under $3) from a "new" indie author and less willing to try a $5 -10 book from a "new" author with a indie or established major publisher.
Once the price becomes more than free (or above $2) I am much more selective and less willing to try an indie author. (this = possible less visibility for the author in download / purchase rankings which = possible less visibility to potential customers).
New author books from established or indie publishers, I try to make sure that people with my same reading tastes like the book, before I consider purchasing above $3. (So, I'm much less willing to take a chance.)
I would think that indie authors trying to get a following would promote the heck out of a free first book (Boyd Morrison
), even if it means thousands of downloads and few actual written reviews, just to establish a following and have their name recognized.
If I come across an indie author name I recognize, I automatically stop and check out the book. There are many authors on MR that I regularly get their books just to support them (several purchased and not read yet).