Today however most poker sites do not allow that option. You either have to play an exact target tournament or use a ticket for a tournament with a specific buyin within a certain period of time. On 888 Poker for instance a 55$ ticket is valid for 30 days, and can only be used for 55$ MTTs. You can not choose to play for instance ten 5,5$ MTTs or five 11$ MTTs instead.
And this does present a bit of a problem as far as bankroll management is concerned. Because either you then play satellites for a fraction of your normal buyin, or you play underrolled for the target tournament. The first option is in theory fine, but you are probably not optimizing your hourly winrate that way, at least not on sites like PokerStars with many regular MTTs running all the time. And the second option will for obvious reasons lead to a high risk of busting your roll or at least drive variance up to undesirable levels.
This is very true. Even though I have studied ICM a lot, I actually did not know the phenomenon presented in the first part of this video, which is, that as a runaway chipleader near the bubble, you should actually just sit out and let the other players collide. To be fair this is actually, what people completely unaware of ICM might intuitively do, because as you say, "you cant win two tickets from one game". So especially in situations, where there are still multible tables near the bubble, it makes sense to just fold and wait for someone to bust at another table. You dont need deep theoretical knowledge to understand this.
But when its down to just one table, you certainly do see players, who think, they should act as the "chip bully" and shove every hand, while in fact the optimal strategy for them is to do the exact opposite. And you will also see people calling waaaaay to wide in spots, where they are only supposed to call with aces. In fact someone recently shared such a hand in the tournament analysis forum, where he had called with 66 and busted on the bubble. So often times you can just lean back and wait for someone else to commit ICM suicide on the bubble.
https://www.youtube.com/watch?v=xjLwdZURi6I