Professional photographers can upload their portfolio photos and get online exposure through Cartina. Clients can easily send queries to photographers via photographers' own description pages. Cartina Portfolio is free for all participating photographers. Professionals who handle billing and delivery of the photo's original to clients can also use other Cartina photo agency services for free as long as annual net sales are less than 1000 EUR. After your sales go over 1000 EUR for the first time the normal photo agency conditions apply - photographers get 60% of each sale.
Too se how it works, see here: http://www.cartinafinland.fi/en/genre/0