while the site's bait in the long term stays the same, the bait you see from day to day differs a lot depending on how the site is doing.
if there's one lee raping every thread and people find it funny, the 'log will be full of it to bait that specific lee. this is like today where people are posting trannybait to farm gegs out of the dotspammer
if the 'log has one or two highly working bait threads, the 'log will either be full of similar bait or it wont have any similar bait threads at all.
if it's a day with an active raid thread, there will be less bait on the 'log at the cost of increasing derail attempts
there's obviously a lot more factors to this but these are just some more noticable examples. the state of the 'log matters a lot to the bait you see