The nature of time-stamping is that it doesn't make sense to duplicate efforts beyond what is necessary for failure tolerance.

Indeed, I should add a pay-with-lightning scheme to trigger an immediate time-stamp transaction for anyone willing to pay for it.

The calendar server software is of course open source, so it's trivial for others to run their own calenders. But there isn't a good reason to do so. 

 my point is that those failure tollerances includes a callender that you have fuck all to do with is my point :).
Maybe the internet archive could pick up that ball 

 I run two out of four calendars. The other two are run by Bull Bitcoin and Riccardo Casatta. 

 bullbitcoin is so based