Thanks for the background and insight into current EYB thinking, Jane.
It's hard for me to see the indexed blog offerings as "limited". Not only are all of the biggest food blogs indexed (with exceptions among the top tier having more to do with the choice made by the blog owners, not EYB), but so are another fifty less widely read ones. When you get down to the level of blogs that fewer than a hundred EYB members are going to add to their Bookshelves, it's the same as with books: members who want to have those recipes indexed now can make it happen themselves.
With very few exceptions, though, those fairly obscure blogs IMO offer less to the EYB membership than a typical not-destined-for-indexing-soon cookbook (say, one on 75 Bookshelves or fewer). Many of those books are well-tested gems that are less popular on EYB because they are older and/or or specialized (in region or topic). They exist, sometimes in large numbers, on real kitchen. library, and used bookstore shelves, and they're going to continue to exist -- something that's not at all guaranteed with a blog. And the beauty of such books is that once made available to the EYB community by member indexing, the work is done -- with real potential for the book to become better known and used by those who might be interested.
But I'm hugely grateful for the effort put into getting and keeping the most popular blogs/food sites indexed. It puts the vast majority of the recipes available to a typical member on a level playing field: books, magazines, and online food sites all are equally accessible to searches and Bookmarking, all open to enrichment via Notes and ratings.