It's not on for all sessions. Not sure what the criteria is or who gets this "feature" and who doesn't. Might be geographical.
P5 calls this a "test" and it's been happening for about 2 weeks. Some saw a max of $50, some got $80. Others don't get a max limit.
There's been some heated discussions in the P5 forums. I think P5 scaled back this "test" as a result.
Currently, I don't see a limit when searching. But last week, I had a $80 default max.
It could be if you're logged in, you see one thing, but if you're logged out, you see another.