I just found this channel
His codechef id: @culfulguy (Probably new account for this purpose only)
Selling JANURARY CHALLENGE (2021) Solutions in his telegram
The full solution for 100 points, paid solution dm me at this link-https://t.me/dumb_codes or search Username-dumb_codes on telegram or mail me at noobcode25@gmail.com
Found this account by submission number
My suggestion, its very difficult to stop these activity especially when codechef is now more into selling unacadamy products
PLEASE MAKE LONG CHALLENGE UNRATED OR A SEPRATE RATING