Many top players don’t hide their names on ICC, for example:
Caruana, Fabiano g ITA 2811
Giri, Anish g NED 2797
So, Wesley g USA 2788
Nakamura, Hikaru g USA 2776
Vachier-Lagrave, Maxime g FRA 2775
Mamedyarov, Shakhriyar g AZE 2759
Vitiugov, Nikita g RUS 2735
Jakovenko, Dmitry g RUS 2733
Dominguez Perez, Leinier g CUB 2726
Harikrishna, P. g IND 2723
Tomashevsky, Evgeny g RUS 2716
Nepomniachtchi, Ian g RUS 2714
and many others.
But even on 2400-2500 level many players have hundreds of OTB games published in mega database and others, and then ICC games aren’t so important for preparations. And also usually there is not enough time to look at all the games.