Unfortunately BURP needs more session contributors and perhaps some more development before it is ready to be re-listed with Gridcoin. A couple of big sessions can keep the render farm busy for months but there have only been a handful of big sessions recently resulting in extended work unit shortages.
It is best suited to very detailed renders that would take months or years to render on one machine, the session vetting process takes a long time so it's not necessarily a good solution if you just want to off-load your own rendering resources unless you have a very flexible timeline.
It's a great project and definitely worth a look if you are into Blender rendering.