Hi Jody, welcome to GFY. And good to read that you're back in the modern world. I think every site does their trailers different I have seen "money shots" on trailers and I think you can do it but not fully. The style of editing is also important if you go with fast cuts (MTV style as I call it) and you don't really give the viewer the chance to "get off" on them then it can't hurt to partially put a "money shot" in there imho. If you make a trailer that has nice slow dissolves and builds up to something then I wouldn't give any of the "money shot" away at all. Then it's more a matter of building up to that sale.
I just launched a site and I edited some trailers myself. I just launched it last Friday so I can't really tell you yet if these will do good for me. It's just testing for me right now. Feel free to check them out and tell me what you think as one editor to another.
http://www.mypobj.com