My usual response to recruiters (if I respond) is a short and polite "Not interested, happy where I am". However, Skyrocket Ventures is different. I've received

My usual response to recruiters (if I respond) is a short and polite "Not interested, happy where I am". However, Skyrocket Ventures is different. I've received several calls from them over the last year, all from blocked numbers (Note that I use Google Voice, so it's possible that is the cause).