>What?
I get your point, I just don't agree with it. The examples you use work just as well the other way you know.
>Do authors and book publishers give books away free once the first print edition has sold out?
No but nor do I expect to pay again if I decide that after buying the book to read at bedtime, I then decide to take it on holiday and read it there too.
>Do restaurants give you free meals after you've eaten and paid once?
many will ask if you'd like to take what's left home to eat there. One fee, two usages.
>Can you buy one wedding album and get 50 free thereafter?
People are not getting more product from you though are they. Just continuing to use the one they have already bought
>Do plumbers keep coming back for free after the initial call-out?
Do plumbers come back to charge more if I start using the bath they fitted to sit some pot plants in water?
>If a client finds a different use for the images they will pay for that usage. It's sound business sense.
Is it really though? how do actually know when a client has taken the use of an image outside the license you granted? I really don't want to be spending my time monitoring my clients. Keeping an eye on all the images I've shot would be almost a full time job and I'd have to employ someone to do it for me. It's all added cost and admin and I for one, would rather be making images and smiling.
Like I say, I do get the principle of what you're saying but it just feels all wrong to me.