“While it’s discouraging to find that many foundations are no longer publishing solicitations or inviting grant applications from new organizations, their change in approach is understandable. Many foundations are overwhelmed by the sheer number of grant applications they receive, and being inundated with applications makes their work to identify the strongest applications—already a difficult and presumably tedious job—that much harder.”

https://www.peakproposals.com/blog/the-rise-of-invitation-only-grant-opportunities