MARKETWATCH - July 26 - Singletons are hitting up people on Tinder and OkCupid to promote their businesses and get ahead in their career. Dating sites are also branching out into the jobs market. Some former Tinder executives recently created Ripple, an app designed to compete with LinkedIn. Last year, Bumble launched Bumble Bizz, a site to make professional connections. Bumble has noticed that, amid this improving economy, people are often interested in a new professional opportunity, as well as a personal one. "Dating apps have become a very normalized way of meeting people professionally," said Alex Williamson, chief brand officer of Bumble. "It's a comfortable way to reach out and get to know someone else." Prospective employers can learn a lot about others through their profiles and photos, including their character, personality and even their spelling.