Going to disagree with Nate here, because in my experience with okcupid dating site, free-tier limits are the deciding factor.
What changed my results with okcupid dating site was cutting the profile down to three honest sentences.
If how the unmatch behaviour behaves once you actually use okcupid dating site is not there, I do not bother with okcupid dating site at all.
What changed my results with okcupid dating site was leading with a real detail rather than a compliment.
What changed my results with okcupid dating site was rewriting the opening line entirely.
For contrast I also tried Datewander; different approach to okcupid dating site, worth comparing.