"500,000" meme (W or 万 is Chinese for ten thousand, this number is denominated in RMB) comes from the supposed reward MSS hand out to people if they report suspicious activities up to the government and it leads to genuine foreign agents getting caught. In reality rewards a much lower than that.
Back when CD was still alive I have seen at least one case of CDer refer to you as 德国老特务, or "that old German spy" in a similar vein. I think generally PLA does get quite annoyed when military watchers go into "bean counting" with serial numbers or ORBAT, perhaps more so than leaked photos. So you do have a bit of a fame among Chinese military watchers for being naughty.