Remember what mama said: 'There are other fish in the sea'
If a company doesn't respond to the lure of your program, try hooking the company's competitor. If one company chooses not to participate in your campaign, tempt the other.
Source: Brandeis C. Hall, RAB
But never send the competitor the same proposal. Re-evaluate your wording and assets for sale to align with the competitor’s goals/messaging/cause marketing efforts.
Similarity of product does not equal identical marketing goals and strategies.