A "Promotional Single" technically can't flop. Seeing as "Stupid Hoe" peaked at 59 on Billboard Top 100, it charted and is a promotional single. "Roman In Moscow" charted at 72 on Billboard Top 100, so it charted. Promotional Singles usually aren't intended to chart, and the fact that "Stupid Hoe" got AIRPLAY, it wasn't even sent to the radios.