Here is a breakdown of EDAM Ent's 2021 revenue as reported by The Official Audit Report of 2021 Agency Income. IU was the only artist under EDAM for this report (EDAM signed Shin Sekyung in the 3rd quarter of 2021).
IU's 2021 REVENUE
Music (digital) sales: 9.6 billion won
CFs: 11.7 billion won
This means IU generated 29.5 billion won (~23 million usd) for her agency last year. We don't know what her cut of this revenue is, though she owns 30% of EDAM.
In 2021, IU's had 6.3 billion (6,326,951,758) digital index points and sold ~400k albums on Gaon.
So between the two: 6.3 billion digital index points vs 400k physical albums, that was a difference of 9.6 billion won vs 4.1 billion won in favor of the digital sales. (Note that IU's has writing credits on all her songs, so the royalty split may be more favorable for digitals.)
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