I think PRC did because there stock was too thin for razors and perhaps used tape to get the right bevel. Custom razor makers do it to preserve aesthetics.
I dont think anyone intentionally makes razors with using tape in mind.
Tim Zowada recommends tape on the spine of his razors from day one. Quote from his website - "The back of the blade should be protected with electrical tape for all the bench hones. This does two things, it protects the blade back from being scratched by the hone, and it sets the correct angle for the edge while on the hone.".