MacKenzie Scott wants to know why she should give your nonprofit a $1 million donation from a $250 million pot of cash

• MacKenzie Scott launched a $250 million "open call" for nonprofits.
• She plans to make 250 donations of $1 million apiece through her organization, Yield Giving. 
• Scott said the funds would support "organizations making positive change in their communities." 

MacKenzie Scott is well known for giving away cash – she managed to donate almost $2 billion last year alone.