[nkozyra]

If people use it every day and aren't interested in upgrading, I'd look at it and say you offered too much to the free option.

You don't want something completely limiting, but you need a carrot there, and if you offer "enough" to a free user they'll lack an impetus to upgrade.

I don't think there's a lot of risk in changing the freemium terms down the road if that's the case.