I would say in this case, seeing how every 4koma this artist uploaded in this series has already been added into the pool, there is no need to ask. Same goes for many other ongoing series that have been going for a long time I wouldn't condone doing whatever you want without asking others, but in this case, it is safe to assume automatically that posts in this series would add to its' pool instead of asking
Eldest daughter-sama, I turned in my marriage registration todayBut I'm so happy... You were unpopular for so long I thought you would die this way...Iku's getting married!?Haa!?Wait... Please do not cry!!Congrats!Oh no...You never told me you had a man!?Call us for the ceremony!!I wish for you to be happyI can't say it was a lie now...