How much money they are making is a pretty minor aspect of transparency which doesn't seem to serve much purpose except to satisfy peoples curiosity (and possibly act as a vanity metric which I feel Ghost's example reads a bit like).
Here in the UK all Ltd companies (and most startups are Ltd) have public accounts, customers in B2C businesses in my experience tend to not look up and read them because at the end of the day it's not important for them.
Publicising them so openly seems like it could backfire and create problems. Customers demanding more, putting a target on yourself for patent trolls, another thing to maintain which could go wrong/mislead etc etc.
Cynics might argue they are not doing this for customer transparency, but as an attempt to put themselves on the radar for potential investors/acquirers.
They raised money through Kickstarter, so they should answer and report to their stakeholders and have the obligation to update them with the progress/challenges they're facing/seeing in their venture.
