It's a free blog site, kind of like Blogger. But here's the really cool part about it. You can put a professional looking squeeze page without hosting fees and without having to buy a domain.
Here's a squeeze page I put together (I am putting this here ONLY to show you a sample...no other reason)
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All I did was copy the html code from my no cost squeeze page generator.
Unlike Blogger, there is no learning curve here. You can do this on Blogger, but there's like 17 steps or something crazy.
With tumblr, you just simply copy and paste.
This way you have something to drive traffic to when you write articles and such.
And yes...I do get sign ups from it.
Good times and fuzzy bunnies