How on earth is anyone ever going to get this badge?
Question favorited by 100 users. This badge can be awarded multiple times.
On StackOverflow there have been 4.3k Stellar Question badges awarded.
Why none on SciFi?
Someone will eventually get the badge here, as the stars accumulate, but it might take while.
I'd suggest it's mostly down to the size of the user-base
Stack Overflow = 5.9m users.
SFF:SE = 40k users
It's also the reason why it's possible for a question to have 15,000 upvotes and over 7000 favourites (with an answer that has 22,000 upvotes).
What order should Asimov's Foundation series be read in? reached 100 users who favorited it in April of last year.