I am pretty sure most girls who we get almost daily pap pics of do call them. Like Rachel Bilson, Emma Roberts, Jessica Alba, Amanda, etc. I'm on the fence about someone like Nicole Richie, but I think she calls too for certain situations (like when she is exiting the hair salon). The only ones who I think don't call are like Natalie Portman or the Olsens. If you think about it, someone like Emma Stone is a much bigger star than Amanda or any of the other girls right now, but we get almost no pictures of her daily life. Don't think that's just a coincidence.
At first I didn't think Amanda was doing that b/c she is in her gym clothes all the time, but I think that's part of the PR strategy- like she is just your hot, athletic girl next door type. You can tell this sort of aligns with her film choices, too. Not so much a serious actress but one that has wide appeal.
OK just went into way too much detail haha.....