MGM employees with clipboards have been circulating around casino floors, hand-paying slot winnings during the time MGM systems have been under attack by groups believed to be based in Russia but with tentacles around the world. While some machines currently are dark or have error messages on their video screens saying they’re offline, play continues on the company’s casino floors, which have now been disrupted nine days. MGM’s networked slot machines are just one of the company’s computerized systems under attack by hackers since Sept. The financial damage involving slot machines on the fritz at MGM Resorts International properties could have been much worse, but the company shut down machines quickly themselves to avoid further damage, a gaming industry expert says. MGM Resorts International’s Las Vegas properties continue to experience technological issues in the wake of a cyberattack by hackers. An employee at Bellagio pays out a guest in cash after they win at a slot machine on Saturday, Sept.