"The downside now is that our initial resources have depleted," a post on the official site states. "Which regrettably means that development is going to slow down until finances can be secured. It's not something we want to do by any means, but as we cannot guarantee paychecks to the team, they each need to be able to spend time on other things to pay the bills."
The post goes on to say that all donations at this point will be used for website maintenance and not development until a large enough investment is made to get studio space. Check out the official announcement on Pantheon's main site for more info.