Both Showtime (seasons 1-5) and Sci Fi insistead on doing clip show / flashback episodes during the end of the seasons.
I don't know about that. After all, Politics and Out of Mind were the only clip shows during the Showtime run.
I suspect the reason there were so many clip shows during the Sci-fi run was more to do with RDA's decreased availability. After all, they didn't do any after he left the show, and Atlantis only did one during its five year run. SGU didn't do any at all.