Take a look at the PTE - it is unfunded and you get 1000cp limit and 4d12h rt after 2-3 days from the start of the world (not from when you start). You also get rt crate regularly. It is expected to reset not long after the Easter break, probably end of April or start of May. It can be reset at any time but usually lasts around 3-4 months between resets. Experimental settings are used before they are rolled out to other worlds. You get a badge for killing the fortress, but it's only visible on a PTE world. Packages such as crystal and power are kept from one reset to another but other progress isn't kept.