Actually you can meet the license by including a written offer to supply the source on demand. There's no requirement to provide the source along with the binar

Actually you can meet the license by including a written offer to supply the source on demand. There's no requirement to provide the source along with the binary. You're even allowed to charge reasonable costs for sending the source. So you could in theory go and include a statement that the source is available on dvd and you charge 10 euros for shipping and handling. Section 6 from the GPL (distribution of non source-forms) b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge. It makes things harder for the people that want to just contribute and is not nice in general, but it's covered by the license.