[gk1]

In other words, you need to understand your acquisition costs and your conversion funnel. Then you can decide what form of a trial--if any--makes sense for you.

[nkozyra]

Right, and maybe that's tough to do from the onset, but as you learn those lessons you can and should adjust.

So if your conversion rate is X and you offer Y and you're losing money, you probably need to reduce what Y costs (or can cost) you.