[EDITED]: @dudex... Yes, they did. The short summary answer? The SG-1 team managed to expose the Ori as the false gods they were, to their worshipper masses and even the Ori-empowered "Priors". As a result, the Ori were stripped of their god-like (but ill-gotten) powers, which were dependent upon their worshippers' fanatical belief in the Ori's absolute divinity.