Make a dark web[1] site? Basically make it impossible to link what you're doing to who your infra providers/internet connections are.
Given anyone can do such nodes and it's relatively inexpensive to get gigabit lines nowadays - it's no doubt a good number of the nodes are owned by various three letter agencies.
Bandwidth isn't expensive on taxpayer dollars, but it is expensive for individuals.
Also because a lot of relays go outside the U.S. the metadata can be collected and stored at will.