Can I charge money for rides in my experimental An-2 if I have a commercial pilots license?
No, you cannot directly charge anyone for riding in your An-2 as this constitutes commercial use of the aircraft, which is prohibited. However, you can “share expenses” with your passengers, and passengers can donate funds to defray operating costs in the same vein. At airshows, experimental aircraft warbird operators and An-2 operators have offered rides to people who have joined their warbird club or preservation society for a join-up fee. This type of back-door commercial use of experimental aircraft has been tolerated and more-or-less overlooked by the FAA.
