Well, the results are in; I
just finished adding my haul to Goodreads. (That GR/Amazon link comes in handy, even if it doesn't fill out the "I own it, purchased from Amazon on this date" info.) Grand total:
410 books added to Mount Tsundoku, at a total cost of zero dollars, no cents, and arguably no
sense.
That number doesn't account for either one or four duplicates, depending on how you look at a "bought a four-volume series as well as the 4-in-1 collection that was also free" situation. I've also added ten books to a "complete the set" wishlist, where most of a series was free but one or two books in it weren't. I figure I'll hold off on the non-freebies for a bit, until I actually decide I want them... or they go on sale!
Damn, my eyes are tired...