They must want to ensure that you can start filling out orders asap to keep people happy. Those fees seem a little steep but not at the same time...
Well, I can't order boards until I know how many total I'm getting. Well, I can, but it's cheaper to wait until I know.
You can avoid Paypal by using Pozible's own credit card merchant system, but the fee is more than PayPal!
I don't mind Pozible's 5%, I think it's pretty fair.
Then I've got 30% tax on the profits of course