Don't the CD/DVDs on magazines cost less than 50p for the publishers?
So you could have a no cd/dvd version but it might cost £5.49 instead of £5.99 etc.
But in terms of visability on the shop shelf, a new reader will spot £5.49 for linux format with no disc, yet £5.99 gets 'em generic_linux_mag_no7 but it has a DVD!
- surely worth that extra 50p
Maybe the magazines should look at having a xmas bumper edition that contains the last 12 months issues in PDF format on the attached CD. You'd have to wait a while to get the issues, but at least you'd get them cheaper.
I don't know if the subscription price would be closer to what you can afford.
Prehaps finding a mate to share the subscription with etc...