Complex sentence: However, Twitpic refuses to state who these affiliates may be and what they gain by distributing the pictures, which has triggered a public outcry by users over the possibility of Twitpic publishing user content without compensation.
Split into simpler sentences: However, Twitpic refuses to state who these affiliates may be and what they gain by distributing the pictures. This has triggered a public outcry by users over the possibility of Twitpic publishing user content without compensation.