First Free Promo - Freebooksy and Bknights

I've done freebooksy twice now. The first time netted me 4500 downloads, my second promo run only 1200ish. So I think you're numbers are okay. It may depend on genre, too. As for follow up sales---that's a total luck thing. And Luck, she doesn't much like me. 

But I hope you get a good number of follow up sales/reviews etc.

Thanks for mentioning Freebooksky, I'd never heard of them before. I did a promo for my new short, Sharpshooter which had zero results. BKnights gave me a refund and I tried again, still no results so I was given a third refund and tried with my Kindle select title which had nearly 600 downloads when I first launched it, still nothing.
I really don't know what is happening lately with sales, I'm tempted to try a different cover for my new short or change the blurb but I can't afford to pay for another cover so what do other authors do?