1. it depends on degica. If they want they can do a weeklong sale of rpg maker games and it's software.
2. Forced by valve. Mostly happened during Main sale. (please clarify)
3. Outside of steam. there is plenty of website selling discounted ROW copies of the programs like humble bundle.
If you want the steam version I recommended to get in other store than steam (like the degigames site)(if you live outside of USA, Live in Place with trade restriction) Unless if Degica already set the RPG maker ROW in steam. (please verify) So if you go to other countries you don't need to worry being locked out of your program.
Thanks for your review.
I was checking the trailer for details and as the woman shut the door at the exact moment the song I was hearing said "you slim the door" and I couldn't resist to add it there. And I used this idea one more time on another scene.