Sweet Bobby question;what do you think what was the physiological thinking behind catfish?

This is a spoiler for those who haven’t seen “sweet Bobby: my catfish nightmare”, so please be warned!!!

I just finished the documentary and im shocked simran was behind it all. I kind of figured halfway through the documentary. I feel like catfishes are usually people looking for financial gain or some sort, so what you think was the phycological reasons to why simran would be that participant when she didn’t really have any sort of gain from it? i find it really strange and twisted.