Donationware
The random photo screensaver is donationware. This is a form of shareware where you can decide yourself how much you find it worth.
The suggested donation is USD 15 / Eur 10, but your donation may be higher or lower. You however must make a donation if you wish to continue to use the software after 30 days. You can either either make your donation through PayPal or send cash to:
Marijn Kampf
3 Springhill Mews
Old Waterford Road
Tramore
Republic of Ireland
You may use this software on a trial basis free of charge for up to thirty (30) days in order to ascertain its usefulness for your purposes. Beyond that time, you are required to either remit payment (this must be $0.01 / €0.01 or more) for its use, or remove it from your computer.