I used to create packages of 20, or so.
Most need the content for submitting (TGP'ing), and require that magic number (15+). I simply decided to give webmasters (WM) the ability to chose the amount, as well which images they want.

Now, I just give usernames and passwords and let them collect what they think will convert.
That way no other WM will have the same package.

Plus, it saves me time!