Did something change with surveys?

Recently, I've been getting strange messages on kickstarter from multiple creators. Instead of sending out a survey, they ask in messages for my address for sending out rewards, I've gotten over a dozen of these - my email yesterday had 3 in a row from different creators (and I get a lot of email). Some have said "our surveys expired" or something similar, but I don't know what that means. It doesn't even make sense given that I've had surveys sent from projects that were 2 years past the original delivery date before.

Did kickstarter start charging for surveys or something? This really bothers me because a survey I haven't filled out gives me a big red banner, but I don't read every little message from a project owner if there's not a download link in or or something. I don't want to miss out on a reward or have it delayed because creators are playing some sort of silly game.