My target customers are hackers/tech people and the companies they work for.
I've had great success with hackers taking Tarsnap to their employers and saying "hey, we should use this". Picodollars don't cause any problems there; they say "it costs $0.30 / GB" and in the unlikely case that management actually looks at the Tarsnap website, it's just a technical thing and they trust their technical people.
The market I am excluding is corporate management seeing Tarsnap and deciding that they want to use it without understanding anything technical about it. I don't mind losing that market -- in fact, I'm happy to lose it, because I don't have the time necessary to provide hand-holding support to non-technical users.
what's the catch with picodollars?
Based on my experience with corporate people, where I spent too many years, the 'picodollar' thing would be a turn off.
Do you intent your target customers to be hackers/tech people and not corporate?
Just curious re your marketing strategy.