It's just a little internet toy that probably cashes out to be a slightly more impactful version of "memento mori", but you could add a little backend complexity without collecting any more demographic information and get a more accurate life expectancy given only one's current age from extant actuarial tables. If you wanted to be extra cheeky, you could have it adjust on a regional basis based on IP address too
The reason I bring up these examples is that they are what I consider the edge cases of freedom of expression. There are genuinely difficult tradeoffs between values, but allowing stuff that bothers some people to be published is not one of them
Free expression means that objectionable things will be said, even published. There are certainly hairy exceptions, like doxxing, slander, or incitement to violence that can put people in immediate danger, but stuff like this clearly doesn't fall in that category, and giving finance the ability to censor in this way is not signficantly better than governments doing so
Personally I observe that social events seem to be most common among students who also are quite poor.
However mental energy and free time is surely correlated with wealth.