What happened is I caught a bunch of camel crickets. I put the cards on the floor next to walls where I have seen them in the past. As I suspected, camel crickets reallyreallyreally want in the bathroom: the cards I placed on either side of the door filled up quickly. So far, no spiders have shown up. It's almost all camel crickets.
To replace a trap, I have to pick up the card full of stuck bugs. I am loath to do this, so I use a pair of 12-inch tweezers I bought when I thought I would be placing tiny plants in terraria (this could still happen). I feel pretty ridiculous doing this but I'm positive that if I ever have insurance with decent mental health coverage I will get it all sorted out. In the meantime, the camel cricket population is a lot less alarming than usual down there. Taking a shower is significantly less horrorshow, thank goodness and thank library school.