Snopes, the fact-checking website that once focused on debunking flimsy internet rumors but has expanded into a 16-person operation that calls out political leaders for dishonesty, is locked in a legal battle that it says has drained the money it needs to survive. The site, which gets all of its revenue from advertising, created a crowdfunding page on Monday, seeking $500,000 from readers to remain operational indefinitely. It says that Proper Media, the vendor that runs its advertising services, has withheld the site’s revenue and has refused to relinquish control of the site. That leaves Bardav — the company that...