We've been informed that Mini Heroes MMO will be closing the game down on August 15th, 2016.
Here are the details that Likwid Games has posted.
"We're sad to announce that due to high hosting costs, Mini Heroes will be shutting down August 15th, 2016. Thanks to everyone for their support and we truly hope you have enjoyed the game for the last 4 years.
Please visit likwidgames.com for more great games and information on upcoming projects!"