These rotating game modes getting disabled every Monday is kind of dumb.
I played poro king once this weekend. I was busy spamming normal draft to get my S rank chest and ranked to gain ELO, I didn't really have the drive to play "poro king." I played ascension 0 times last weekend. But throughout the week, when I was bored of regular League, I had the urge to play ascension after it was gone.
People generally play "for fun" modes when they "feel like it." Having it be a scheduled thing where "you have to play it on these 3 days of the week or it's gone" is kind of dumb.
Splatoon does this with Splatfest (it only lasts 24 hours). Do you know why it actually works? Because people actually like Splatfest, and it only happens once every 3-5 weeks. (And has rewards attached to actually playing it). A permanent "for fun" rotating game mode in a MOBA game (with no special rewards) should not have similar limitations. It should be open ALL week, and simply ROTATE on Fridays. Then even if I miss the mode I want to play - something else will be there when I DO want to play it.