1) There's watermarking on both of the sides, but it's less than an inch long and covered by my fingers when held. One side says Spigen and the other side says Designed in California, Made in Korea.
2) I ordered it directly from Spigen with a 25% off discount code.
3) I'm not concerned at all! Its rubbery enough that I can bend it with my hands but solid enough I can't bend it completely in half. The inside has dots so it doesn't stick to the phone.
Thank you! I really love it. It's so thin