

The wall
Immediately this screams of co-op or something. "She went dark months ago. No posts. No streams. No signals. But we know she's listening. She always does. The Wall is her frequency. Every mark you leave gets archived: a permanent record of everyone, everywhere, who showed up when she went quiet. Paint something. Make noise. Leave your mark in the archive. Bring her back."
And it looks like you can upload stuff to the signal archive if you "found something"