$3/ month isn't that bad. And you really only need it if you want to use homebrew.
If this were about getting PDFs of the D&D books, I'd agree with you. But it's not. It's a character builder, campaign manager, etc. You're paying for the usage of the information in those books in these tools. Basically, look at a character builder like Hero Lab, only with a bunch of other tools on top of it.
It's unfair to compare this tool to simply scanning a book.
You forgot to add the $5.99 for shipping. Amazon: $35.99
However, the character builder is not particularly useful. Why can't I print out my character on a standard character sheet for my live game?
$3/mo isn't bad.
$6/mo isn't bad.
Rebuying the content just to have a digital version of it? Hard pass.
I'd rather pay $10-15 a month and get everything, or pay no monthly fee and have to buy every product I want to use digitally again. But rebuying the content and then paying a subscription to access content I own? That's like charging me to open my books.
Why is Wizards terrible at online systems?
I'm flat-out going to make the prediction that at least 50% of the people who are saying they won't buy and it's all too expensive will end up buying it and subscribing at some point. A lot of the complaints I'm seeing are based entirely on misunderstandings that will be clarified after some use of the final product. That, and once they see how popular DDB is, they'll jump on board because it's no longer a big scary wolf barking at their heels.
And please, by all means, bookmark this post so that you can come back and tell me how horrible and unpopular the product is after a year. I'm predicting that DDB will be incredibly popular and successful so I look forward to being proven wrong.
Why am I feeling some Deja Vu from my experience with the release of Sword Coast Legends... super hyped until finally seeing it...