To be honest, I'm not sure what they were thinking when they released their reverse-engineered iMessage app. But I'm hoping they're back on two solid feet and will get back to focusing on their original mission because it'll mean more open source contributions back to the matrix project.
I'm not super excited about them getting bought, but at the same time I think it's better than the alternative. Beeper's CEO (now former after being bought) is infamous for creating the startup, Pebble, then running it into the ground by not selling it. As unfortunate as it is, the reality is that companies, even ones based on open source projects, can't survive without funding.