I personally like to see the money up front. I do not take it but my clients either leave it on my kitchen island, in the bathroom or in the basket on the night stand. I do not like it handed to me but I do need to see it upon arrival. This just makes me feel comfortable. This cuts down on the chances of being ripped off, shorted or the awkwardness after the session asking hey did you have my gift or where did you leave it. I want this to be a fun fantasy not ok give me my money and get out. I have had a few regulars before completely forget and in the moment thank me for reminding them. I like it layed out and displayed when you get here and then we dont have to think about business at all.
I'm not here to rip people off I actually enjoy what I do. I do this because I enjoy this and it is extra money in my pocket I own my own business where the majority of my money comes from. Both parties know why we are seeing each other so we shouldnt have to discuss it or make it a transaction as we should have already discussed those details after screening and during booking.
As for the cop thing you are busted the minute you are set up. Paying up front and you are paying for sex. Paying after and you still paid for sexual services. If you are a target of a sting they already have enough evidence about you and what you are doing. You showing up or inviting someone over seals the deal.