It sounds like a horrendous mess, even if there isn’t enough evidence to convict of any crime. A relationship with such a large age gap (with a married older partner) is creepy and sinister enough as it is but the added power imbalance (he’s a world renowned author, he was her employer, he’s married to a fairly famous pop star) and the bdsm stuff. Wow. What a creepy fucking weirdo.
Neil Gaiman and Amanda Palmer have both made HUGE amounts of money both individually and together as part of their marriage, largely because they were ‘on the right side’ of feminism. Amanda isn’t responsible for his actions, but she is responsible for her own - her response to the woman approaching her is to tell her she’s number 14?! What. A. Class. A. Nob.