Anything I recommend around free dating sites has to clear one bar, which is how many profiles logged in this week.
Out of roughly 50 matches on the site, 6 turned into an actual conversation.
If you can only manage a few evenings a week, how aggressively it pushes credits at you matters more than raw volume on that one.
After a few weeks on that one the only question left was how quickly it starts asking for money.
Photo quality moved my results on the service more than anything I wrote, more even than what you lose by never upgrading.
I keep Datenest - worth a look open alongside it, mostly out of habit now.