Avon does not do fundraising for their own company. What they provide are tools to raise funds for your own organization or school, and there is no collated database of funds raised using Avon's services.
You can get the current daily price of silver by Googling the keywords SPOT PRICE SILVER. If you find out how to predict the future, please let the rest of us know what the price will be next year so...
They get paid at the same salary scale that the other members of their departments or agencies get paid, with perhaps a small stipend for theiir status as "technicians."