I also don’t know who Rav Vosners’s granddaughter’s rav is, or who is the rav of whoever started the campaign. Rav Vosners’s himself obviously didn’t allow it (although he might have, since someone could donate while at work).
I don’t believe R’ Chaim’s position is as presented.
There’s a difference between allowing a child to browse at home and performing a specific task under the principal’s supervision.
So far, 0-3.