If you become a paying customer again, you can use the setup page to hide when you joined long ago, and also when you were logged in last time.
I would keep the feature that allows girls to see that you viewed their profiles because some will message you.
Overall, both men and women tend to want to look out for new profiles, which is why many girls on Seeking delete their profiles and then join again using a different name. After a while you can tell from their language and even photos used (even though they post new photos).