If I/ we have learnt anything in this thread is women don't apply logic to why they do a lot of things.
The deleting profiles to us as men is irrational and like others have said could be down to a number of reasons one chick I'm currently talking to says more men than expected like sending dikk pics as their second reply. Others said they may have been enjoying talking to a guy but the majority were off putting so they cancelled the profile. A female friend said she uses the apps as ego boosters when she's having issues with the guy she's seeing. She'll be on there for a day see what hot guys have liked her then she deletes or hides her profile.
It's why I always try and get a chick to come off the app, one Korean chick I've now met up with. We had more than enough back and forth and so I left my number with her and said nothing else.
She either wanted to come off the app or not. And she actually DL'ed whatsapp to carry on talking to me the next day. Then she deleted her Hinge profile as she says she wasn't feeling it.
She felt me on Saturday night though.