OKCupid doesn't allow you to log in. The error is password invalid.
I can confirm as of last weekend that OKCupid does in fact allow
all functions from account creation, to usage, to deletion, via Tor.
HOWEVER, on depending on the exit, you will be outright blocked
from the site and presented
I can confirm that www.geocaching.com, www.waymarking.com, and www.wherigo.com
have been abused by someone using Tor. They are currently investigating the
abuse and attempting to bring legal action against abusers, so that is likely
the reason for a potential block.
All the best,
Joel Knighton