Indie developer Petter Malmehed released his unconventional alternate reality puzzle game After Hours in 2018, and according to Malmehed himself, it did alright, even if it wasn’t a big commercial success. However, in recent months and years, he’s seen its user reviews on Steam gradually decline at the same time as its completion rate is steadily dropping, and he thinks he knows why.
I think most business and official correspondence has a bold subject line, and in the past perhaps they used full caps on type writers (what would I know, I was born in 1990). I like the idea of just putting the subject in the first couple of lines to make the point, sometimes having a dedicated subject line takes up precious space. I usually re-write several times over until it’s cropped enough to fit the subject line :)