A single-character post? 🤔

Attempt at an explanation: There is a light on upstairs, but nobody is home.

I imagine you are just typing a single character like "a" or "=" I don't know what that does though, up to you to try.

Hmm, this is just my own speculation, but I think they're leaving single-character comments because they want to get attention.

Indeed

I feel like they might just want to earn points by commenting to participate in the points campaign, rather than actually wanting to "communicate," which is why some bizarre, meaningless comments show up 🤔