I think a good comparison would be something like Khan Academy (in its first five or so years or during the 2010's decade). Khan Academy is clearly geared at su

I think a good comparison would be something like Khan Academy (in its first five or so years or during the 2010's decade). Khan Academy is clearly geared at supplemental or even primary learning in some cases. And of course now even more so. When I was going to college if I wanted to learn a math concept better I went to Khan Academy or its contemporaries. Anyone who suggested Chegg to me did it to say "if you're looking for answers to your problem sets, go to Chegg". And usually people split memberships to do so.