Pentagon (Cube) had its first #1 5 years and change after debut.
Astro had its first #1 more than 5 years after debut.
That kind of situation is quite rare. (Technically Nuest has the record for the longest time it had from debut to the first #1 in a major station, but its history has a huge gap. For all practical purposes Nuest re-debuted in 2017 so its history prior to it is not counted.)
Astro's fortune entirely depends upon whether Chaeunwoo is willing to continue his idol life, nothing else. Myungjun of Astro knows that so he has already released a trot song with Kim Taeyeon (not SNSD; the child trot singer) to build his post-idol career.
However Pentagon would be different.
BTOB is a mature group, Gidle kind of imploded after the Soojin fiasco, Lightsum going nowhere so Cube will need Pentagon.
However, Pentagon has some members who are quite old.
It is probable that cube won't make too much money from the re-signing, with more to the members. The members would know that they are in the driver's seat,
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As there are more acts and more competition, there would be some late bloomers whose late rise is unlikely to do much good for the companies.
OhMyGirl rose on its 4th year , with already half of its contract having passed. Either 1 o 2 members have not re-signed while the end of contract is at April 1. A comeback, probably the last with the 7 members (one already left a long time ago), will happen in March.
At least WM used it to sell the company to RBW.
Astro and Pentagon present interesting cases ; what to do with late blooming groups who might not make too much money for the company in the second round of contract but are nevertheless needed to maintain the company's reputation.
In my opinion, the deadline of an act which becomes a net profit for the companies lies on around the end of the full 4th year; from then, whatever the act is going to earn would be net sink. In other worlds, the companies are not going to get too much benefit for an act which only became somewhat prominent after the magic 4th anniversary was over.
Late bloomers, whose successes might be good enough for the members to pat themselves at the back,would still not make the company too much money which means very little support from the top. In addition, because of difficulties of distributing the profits, usually on the final year of a contract there is no promotion unless a majority of members had re-signed.
It might be cruel for the acts which only found their place under the sun after 4-5 years of contract, but at that point companies won't recoup their investments on such act and any late blooming success , while making good stories, won't really change a company's fortune.