Broadly speaking, a month is about the minimum before judging any platform — it is the single change that made the most difference. Is zoosk online dating more popular in the US or in Europe?
In my experience, asking something answerable in one line works better than anything clever — it is not complicated, it is just easy to skip.
From what I have seen, expecting any single conversation to work out is the wrong frame — that has been consistent for me across a few different platforms.
In my experience, expecting any single conversation to work out is the wrong frame — that is the bit I would tell anyone signing up today.