The half hour or a hour a mentor takes to help Plato for free and you can't bother to even assist them by allowing to send a share of the profits to a charity of their choice. If they want Plato to send money to Alzheimer Foundation you should let them and not limit it to some 'improve Eng Leadership'.

Also remember that a mentor could also just arrange this themselves by getting an open office/walk-in hour via Calendly and spend its one hour a week better. One hour can reasonable represent a $175-250+ hour rate. Close to Plato's monthly fee.

Personally, I would go for the latter, or help the local school with teaching kids through something like Codeclub. Codeclub was really lot of fun