I got one too, kinda tacky imo.Umm, I just got a coldcall/pre-recorded message from Birchbox reminding me to resubscribe by August 31 to get the August box.
Umm, that is not my favorite new tactic. I imagine it's related to my old, third account, because my other two received Aug boxes.
But FYI, don't open a new account before 8/31 unless you want an August box!