Tin foil hat on: I think Roger asked Fisher to draft Sam. Fisher has always been Roger's handboy, every year when the NFL wants a stupid rule explained to the media it is Fisher they trot out, no matter how much his team was an offender of that new rule the previous year. And Fisher ALWAYS toes the company line when he explains those rules.
So Roger asks the Rams to use a late compensatory on Sam, PR problem over. Fisher then goes on to make sure reporters know Sam is not above being cut. Fisher has no plans of having this PR nightmare follow him all year.
Does Sam know his chances of making that team are slim and none? Hell yeah, just like he knew the PR implications of lip smacking his BF on national TV. At the combine, Sam looked very uncomfortable with all the attention, but in the meantime, he has grown quite comfortable with the attention. He has made the big leap from pre-empting the media on his story to being the guy who runs with the story. He has some good advisors, no doubt.
This is about money and exposure (which could mean future money). He stands to make a lot more from TV than he does with the Rams, who I think have no intention of keeping him. Oprah is going to make bank off of this, and the Rams should be very nervous. The slightest mis step by a single player or coach who isn't politically correct enough COULD result in a story that makes the league look like a bunch of homophobic asshats.
That favor that Fisher did for Roger could turn out very bad. I really doubt it gets a completely positive spin form Oprah and co.