Ticketmaster do not charge anything for their e-tickets, so I don't see why Ticketek do. $5 to send an e-mail (which is automated) is ridiculous.
Ticketmaster do charge an $8 "Order Processing Fee", so I don't see why you think they don't.
Because the pick up / posting costs more on top of that $8 fee you quote. So, I'm not saying their admin costs nothing, I am saying their e-tickets cost nothing to 'deliver', because they don't.
edit - though having gone through Ticketek pricing just now, I see that $5.25 is all they add on. So yes, they'd be better calling the $5.25 a 'service charge' (although it's quite a lot really, 20% of your average ticket for not much work) and saying Ezytickets are free.