Maurus
The Great Gazoo
Assume all of your friends (since that was used as an example before) know you're a pilot (reputation). I think most of your friends would assume that you'd be willing to take them flying if they pay for it. Unless you give them all a list saying "I will only take Jim, George, and Grace flying, all the rest of your suck", then I think this is a valid interpretation. I'm not using this as an argument in the general discussion, I'm just offering up a different view point.
"Serving all" is much broader than friends. Also the "reputation" is not defined in that sentence as "being a pilot" but instead as "being a pilot that serves all". "Serving all" would be just saying yes to anyone and everyone that wants you to fly for them. Unless you have a ton of friends that want to pay you to fly their provided aircraft, there will be no issues.
Again, read "organization" as "friends". I would assume that unless you're a neo-nazi, a "significant segment of the public" is available for membership to that "organization".
If the friend would bring someone else along that is not directly involved in the reason for the flight, that interpretation could be a problem. Last I checked though, there is a legal interpretation of "organization" and it doesn't mean "friends".
Mike H and maybe subpilot have the view that since the OP isn't holding out, it's ok for him to be paid for the flight directly by his friend.
So long as the only compensation being exchange is for the pilot's skills and the pilot remains outside of the acquisition of the aircraft there should be no problem.
"I'll pay you $100 to fly me in the airplane I have provided [read my definition above] for the flight." This would be legal so long as no "holding out" or other activities that would be defined as "common carriage" is involved to get to that point.