Honestly, (thats a personal feeling) the BSD community is much more about sharing and providing knowledge (especially in a very valuable form). We can see this in different approaches like @vermaden@bsd.network with his BSD focused newsletter, @stefano@bsd.cafe pushing in for this awesome
#BSDCafe community or @dexter@bsd.network pushing all the jails/bhyve stuff (and there are many more examples, sorry not to mention all ones!).

Everyone does it for free in a suitable way with his own resources each one can afford. Everyone is helping each other. Let’s see that we can bring more values into the community.

You already mentioned some of the interesting points like jails, which are still heavily used even nowadays. But also other things like zfs (ok you could also do it on Linux), pf, etc.. This service should give the possibility to test such things but also all other things which require a static IP - running own Mailserver (including ptr, …), authoritiive name sever,…

If it even helps just a single person to improve it was worth. Currently, everything is build on and running on my personal devlab systems where I can provide leftover resources, but still - for my own security reasons - they’re running on a different net link including completely different ip subnets (imagine getting hit by mail blacklist, etc.).