Thank a lot for your feedback on this!

Based on my past experience the storage limits are well over the actual needs. It usually only grows when bands have a lot of photos on their website. At the moment I'm implying that a band with a lot of photos has been around for quite some time and is probably also somewhat successful by then, so they'd have to choose a larger plan anyways (because of increased traffic).

Yearly plans is definitely a thing I'm going to add in the future. :)