I have had only so so success on POF where one date did result in me meeting and seeing a guy for a while. Most guys I have emailed on POF tended to be losers. If you upgrade you will probably just have more losers contacting you.
My 2 cents worth.
plenty of fish is not a free site. It doesn't even mention it anymore at the top where it said it was 100% free dating.
You can barely use the site now for free. To many of the features that I use to rely on now require me to upgrade my account. I last used plenty of fish about 3 years ago and I didn't have to worry about this crap. I am angry that they want me to spend $10 a month so I can get shot down by women.
Bring back the free version of plenty of fish.