So a chapter of TKA cost around 10-12 ss and contains around 2 000 words.
The entire Harry Potter saga contains 1 084 180 words. At 10-12ss/2000 words that's 5420-6505 ss to unlock the entire harry potter saga. The best price you can get is $1 for 65 ss. So the entire Harry Potter saga would cost $83.38-$100.07.
Getting the entire saga on kindle would cost me $66.09
I'll let people judge if SS are actually worth their price.
Also I've been seeing some novel that you can unlock by watching ads which I prefer by a long shot to being forced to pay ss to unlock stuff.