I know this is a site about free otome games, but hear me out.
I thought I'd start posting posts whenever I notice commercial otomes for sale for at least 50% off from original price.
That's practically a steal and could be exactly the price some people could afford to spend at that moment.
So I´ll list some sales I've noticed:
Amnesia: Memories 90% OFF at Steam
Date Warp 50% OFF at Steam
Hatoful Boyfriend 75% OFF at Steam
Cinders 60% OFF at Steam
Pyrite Heart 50% OFF at Steam
1931: Scheherazade at the Library of Pergamum 85% OFF at Steam
Winter Wolves, who have created several otome (and non-otome) games also have 50% OFF for every game they've made. Check out their site.
That's all I have for now.