Well, honestly I don't quite understand.
The purpose of this campaign is to raise money for "linterna magica t-shirts"
and not for linterna magica itself?
Why did you choose this indirect way?
I mean I'm glad to hear that you started a campaign, please don't feel
offended.
But I think there will be very few people be interested in t-shirts for a
piece of software and those people are mainly interested the big projects.
Maybe I'll buy someday a GNU t-shirt - it's my operating system, after all.
But linterna magica?
People who buy this t-shirt do it for the sole purpose of giving money to you
for your work, so why taking away some part of this money for the t-shirt
manufacturer etc....