You’d have to want to signal very strongly to overcome the inconvenience of doing the paperwork and forking over cold hard cash. Self-signalling seems to be a plausible motivation, but I’m not sure how much benefit you’d get from being able to tell other people about it. Not to mention the opposite pressure that most people have because they have to convince their close family members to respect their wishes.
You’d have to want to signal very strongly to overcome the inconvenience of doing the paperwork and forking over cold hard cash. Self-signalling seems to be a plausible motivation, but I’m not sure how much benefit you’d get from being able to tell other people about it. Not to mention the opposite pressure that most people have because they have to convince their close family members to respect their wishes.