[Periodic]

This has a much bigger impact than canceling your own subscription. It raises the danger that you might impact other players to quit. If I were a new player and I found that the servers were too clogged over protests, I might be inclined not to continue. If I were a more casual player, I might go outside, go play another game, or do something else and find I have better things to do than play Eve every night.

This is actually how I quit MMOs in college. When it started to feel like a job when I logged in every evening due to the commitments the game placed on a guild for "serious progression" I stopped logging into avoid it. Then I realized fairly quickly that were many other things I'd rather be doing and I cancelled.

Get someone to stop logging in for a week and you could very well lose them.