Also StavrosK talked about subscription fees here: http://blog.historio.us/
Also StavrosK talked about subscription fees here: http://blog.historio.us/
More than $20/year, however, and there has to be a compelling discount or a solid trial before I'll shell out for a whole year.
I'd have no problem spending $20/m on a good product I like but I would have a problem spending $20/year on something I haven't tried, because I "feel" like I'm spending more and committing to a longer term with the product.
Maybe that doesn't make sense, but the issue for me isn't the money but how I see the value.
It's easier to bill and can result in more up-front revenue for your growing service BUT the psychological angle means billing monthly can make you more money (e.g. how $5/mo "feels" vs $50/year.. yet the former makes you more money), plus the angles `citricsquid` mentions.