[techas]

Still many many journals don’t apply double blind reviews. There is no advantage of don’t doing it. There is no extra work in doing it.

So I assume that it is not done to keep outsiders out of your garden…

Honestly, I don’t find any other reason to don’t apply it.

[2dvisio]

There’s tons of extra work in double blind (for the author mostly, but also for peer reviewers and editors/chairs). Speaking from direct experience as author, reviewer, and chair at conferences. And generally the benefit is totally lost as you can easily circumvent it especially if you have already published in the field by just citing your previous work.

[nicce]

I don't see the extra work for author - how exactly?