To be fair, even accounting for viral marketing, A20 Lite's record is indeed historic.

Kiki, All Def also brought great songs early on and did a good job with marketing, which successfully grabbed the public's attention.
However, the sole and decisive risk for A20 is the nationality issue.
The agency itself is located in Singapore, and unlike Etu-gong, the group is openly targeting China. Ultimately, they will have to decide whether they are C-pop or K-pop in the near future.
They must choose between building a domestic core (with overseas fans following naturally) or using domestic performance as a portfolio to facilitate global expansion.
But if the agency maintains an ambiguous attitude regarding the group's identity while claiming they are a group with Lee Soo-man's signature style, it could trigger a significant backlash.