After the free nine-valent vaccine, the朋友圈 instantly quieted down, and no one talked about "loving oneself" anymore.

Sunshine roses dropped from hundreds per jin to just a few dozen, and no one posted "Today I ate noble grape" anymore.
When the nine-valent vaccine cost several thousand and people had to queue up to get it, posting the vaccination record on social media seemed to symbolize valuing health, taking action, and investing in oneself. If a boyfriend paid for it, it was seen as a sign of being favored.
Since it became free and everyone can get vaccinated, the scarcity disappeared, the signal depreciated, emotional value diminished, and the same applies to Sunshine Roses.
This is actually a typical case of signal value at work.
These kinds of people tend to think with their prefrontal cortex; they don't do things for the intrinsic meaning of the act itself, but rather for vanity, showing off, and the perceived value of the target.