Boy am I late to your question !
Love Profusion.
Have been starting indoors in mid-March for the last 5 years, and find by the time I plant out in the garden late May, there are buds forming.
In the early years I kept notes on which colors germinated best. Red came in last place.
I kept a photo journal on the most prolific sized plants with the most blooms. Red came in last place.
I suspect pink, red, and the mix of the two aren't favored by nurseries.
Last year I didn't bother buying red seeds.
Also...I have been saving Profusion seeds. I recorded that they were true to last year's plant, but not all of my saved seeds sprouted. I was very surprised, as Profusion is listed as a hybrid.
(Below) Surprise ! These were plants from the saved seeds !
My seed source is Park Seeds.
