Storm chasers are not generally paid to chase, with the exception of television media crews in certain television market areas, video stringers and photographers (freelancers mostly, but some staff), and researchers such as graduate meteorologists and professors. An increasing number sell storm videos and pictures and manage to make a profit. A few operate "chase tour" services, making storm chasing a recently developed niche tourism. Financial returns usually are relatively meager given the expenses with most chasers spending more than they take in and very few making a living solely from chasing.