Ann Arbor-based Non-Profit Enterprise at Work leapfrogged two other leading contenders on crowdfunding website Crowdrise, to take the $50,000 grand prize for raising the most money in the RiseDetroit Challenge. The winning nonprofit, which does business as NEW: Solutions for Nonprofits, more than doubled its fundraising total in a surge between last Wednesday afternoon and the contest’s conclusion Thursday at 11:59 p.m.