If I understand your question correctly, then "Donations" and "Backbone" are the 2 words you want.
I think "A drop in the bucket" means an effort or action having very little overall influence, expecially as compared to a huge problem. A $100 donation from an individual is generous, but it is a drop in the bucket compared to the $100,000 fundraising goal.
More generous and most generous
The superlative form of "generous" is "most generous."
more generous, most generous
more generous, most generous
The base word of generous is "generous."
Generous with is a general term If someone is generous with money it does not say how Generous to is specific, not general If someone is generous to someone else, that says whom the money goes to
most generous, more generous
more generous, most generous
more generous, most generous
more generous, most generous
more generous most generous