Recently, an anonomyous post from the Infinite Crisis staff has told the Infinite Crisis community that the game will close in August. The official statement is below.
"After much deliberation, we regret to announce the official shutdown of Infinite Crisis. We will end development efforts today and will close the service on August 14, 2015.
Between now and August 14th, the game will remain available to play completely free. If you have any questions, contact Customer Service for assistance at http://support.infinitecrisis.com.
Steam Customer Support will refund any customer who purchased either The Starter Pack or The Elite Pack. To request a refund, please follow the instructions here: https://support.steampowered.com/kb_article.php?ref=6345-QIDX-7244.
This was an extremely difficult decision to make. On behalf of the entire Infinite Crisis team we want to thank all of you for your feedback, support and for joining together to create one of the best communities in gaming."
As stated above, you can get a refund for any Starter Packs or Elite Packs purchased.