I just feel it's hard to evaluate the price if I don't have a rough idea of how often there might be updates. Is it a monthly thing? Every 4 months? 8? Once a year? I don't know how much time passed between v1.0 and 1.1 and 1.2. I don't even need exact dates. A statement like "We expect to push out a new version every few weeks/months/once a year or so" makes it easier to reason about the cost.