Where are you getting that this refers to Tracey? All Mr. Todd says is "Tell her she has the job" and hands his man some money. And this is (apparently) after Tracey is killed. Another possible explanation is that this is the money offered to Ray and Darya to kill Evil Coop, although Darya says that she didn't have any contact with the person who hired them. More likely it's in regards to something we haven't seen yet.
I need to rewatch to see if I agree, but as my friend and some others online have said it, Mr. Todd mentions a hired woman. Mr. Todd is working under a billionaire he doesn't like working for but the identity is kept secret. The billionaire hired a woman to check on the Glass Box Room he mentions. The woman he hired is Tracey, the girl who brings the man coffee. The reason the guard is not on duty is because the billionaire set up for the guard not to be there so the girl could go in and do her job to seduce him, as she was hired to do (but probably didn't know why, just like he doesn't know why he's watching the box). But apparently the proof is that they confirm the woman they hired went inside the Glass Box room, and Tracey is the woman who goes inside the glass box room, which means she was the hired woman they mention who went inside. Mr. Todd then mentions the billionaire running the operation is someone you don't want to deal with.
I only have seen the episodes once but this was how it was explained to me and saw a few others also picked up on this online, since apparently they mention a woman who was hired by the same billionaire running the experiment who entered the glass box room, and that'd be Tracey which might also explain why the guard is gone so he might invite her in. This is just how I understand it as it was explained to me, I didn't pick up on this myself.