I suggest you meet government agencies and women organizations. They might be willing to sponsor.
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churches or religious organizations
Syria
There are a variety of sites available to sponsor children from many different countries. A few of the organizations that are reputable are Worldvision and Save the Children. They are both great charities.
Organizations or governments sponsor reverse brain drain programs.
An official sponsor of an event or organization contributes money or other assets to the organizations or organizers of the event usually in exchange for the right to advertise its connection to the event or organization. For example a sports shoe company might become an official sponsor for an athletic event or athletic organization.
The National Merit Scholarship Corporation funds National Merit scholarships through a combination of sponsor organizations, colleges, and universities. These sponsors provide the funding for the scholarships awarded by the National Merit Scholarship Corporation.
The Spina Bifida Association of America and SHINE (Spina Bifida Hydrocephalus Information Networking Equality) in the UK.
Sport organizations get money from the Czech government as well as Czech national lottery Sazka (which is, at the moment, near a bankrupt). Sazka divides all its profit between different Czech sport organizations.
Yes, you can potentially get a sponsor to pay for your book to be published, but it can be challenging. You could try reaching out to companies or organizations that align with the themes or topics of your book. Another option is to look for crowdfunding platforms where supporters can contribute to help fund the publishing costs.
They do so for cheap advertising to certain groups. Events need to pay for the expenses they incur. Sponsors work well for these groups. It is a great relationship.