In some countries the archives can be browsed online so no need for such sites in this case.
But those services can still be useful to find an unknown branch of relatives when the ancestor who had emigrated in a different country didn't let any info regarding their previous life.
Interesting idea but I do not see the point: people are able to compute the same results mentally very easily.
By the way, I would suggest adding an option: how many consecutive days off does the company allow.
And which days are absolutely not allowed to be taken.
10 years ago, in my company (based in Japan), taking a day off on the first day of the week (generally Monday unless there's an holiday) was not allowed due to the general meeting kicking off the week. This changed recently in my company but as this meeting is common in many Japanese companies, some companies might still apply this restriction.
Likewise, taking a day off before or after a holiday was not allowed except for some specific days (typically Golden Week end of April/beginning of May, Obon in August, and the end of year/New Year). This changed a few years ago.
There's the matter of scope but there's the matter of motivation too.
When an opensource application like GIMP, Blender, or even Manuksript for a lesser known example, are started, it's mainly because proponents of opensource want to use such application but dislike closed source. They fill a need, so getting new people willing to participate even after the people who started the project moved to something else is possible.
For an opensource game, whether a clone or not, the project is generally started because some proponents of opensource like the original game and want to share it with the community. But they are not really needed per se. That means it's more difficult to get new people joining the project, and consequently if the original team cannot keep getting motivated for many months/years, the project end up abandoned.
The interesting thing is that like many people, they guessed that a lot of people would be contaminated during the 3-day weekend a week ago (great weather, cherry blossoms, and last carefree moments for people who will start their first job on April 1st). It's not innocent that Abe called for postponing the Olympics just before that weekend.
Koike could have asked the parks and popular venues (department stores) to be closed a week ago, but instead only asked people to refrain from going. What was poised to happen happened, and the number of infected people exploded half a week later.
But those services can still be useful to find an unknown branch of relatives when the ancestor who had emigrated in a different country didn't let any info regarding their previous life.