@JNat speaking of bullet.. You should watch some ChessNetwork on YouTube sometime. Really cool guy, does lots of bullet which makes it very interesting. (Thanks to @Uni for introducing me to him).
Hmm... so games of lower-rated players also appear on Lichess TV for a short time. That might explain why one of my Tournament games suddenly got 3 spectators xD
Going to sleep. Exams tomorrow. A tough subject I was trying to study but ended up killing time by watching youtube videos and playing in chess tournaments (sigh, typical)
rated effects your rating, casual does not. bullet == <= 1 minute of total playing time per player, blitz 2-10 minutes, real time is anything greater (up to a day) and correspondence is anything longer than a day.