Yeah if the IP changed it's alright, but they can identify by machine ID also for example - so when you install an app on a device, the app can collect a the device number and match other accounts. There is a lot of ways also, I think I explained it on the other thread. I don't know which technologies Tinder is using, but I assume they are pretty advanced. If they have face recognition technologies, you are pretty much screwed. OP did you try to contact Tinder customer support?