What

Funding opportunities is a content type and you can set up integration with Funding Institutional to get you content automatically populated. 
If you get unwanted opportunities, then there is no way to "disclaim" a funding opportunity from Pure.

Why

This is because the funding opportunities are managed from fundinginstitutional.com.

• You should be able to log in there and manage your Institution key.
  • Pure will only fetch labels and funding opportunities that have labels and are related to the Institution key.

More information

5.17.0 Release notes 
KB-272: How to enable Funding Opportunity 
KB-391: Funding Institutional integration configuration 
Note: Some of this information is for internal use only and might not be accessible.