well then I'm really glad that I never find stray coins laying around my domicile because it probably indicates reduced likelihood of insects and arachnid infestation.
Hate to be that guy but they don't pay you but the landlord. You are under obligation to pass it on. This can happen in form of a tip. You don't have to mark it as the spiders' tip, just make sure not to misappropriate anything.
Spiders are cool in the way that you always have the same mass of spiders in your house.
You either have a lot of small ones or a few big ones. You can disrupt the balance of sizes by killing the big ones or by vacuuming the small ones, but at the end of the week the mass stays the same.
I'd be more worried if I didn't have spiders in my home. That only happens in environments that are also unsuitable for humans.
