I have purchased a few of the bundles but I find that most of the time there are not enough books in the bundle that i actually want to make the bundles worth buying to me.
Baen made a bit of a deal with the devil to get Amazon and some other big distributors to sell their ebooks.
It used to be that the standard Baen price for ebooks was $4, then it went to $6, now it seems to be $7 - $10 depending on the book.
I still prefer ebooks. They take up no space on my shelves.
I am amazed that the Ring of Fire series has managed to produce 40+ volumes of what amounts to fan fiction that is actually selling well.
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Warning - I am not an expert on anything having to do with this forum, but that won't stop me from saying what I think.

Bob