Five things you need to know today, and no comment(s)

Good morning, everyone. Here are the five things you need to know in Boston business news to get your day off to a smart start, and why newspapers are right to give up on online comments. Encore casino revenue drops Gambling revenue dropped in January at the Encore Boston Harbor casino in Everett, but rose at the state's other two casinos. MGM Springfield rebounded after its worth month ever in December, while Plainridge rose slightly after a seven-month skid. Something stealthy, something new Mobile…