How many times do I need to contact a sponsor before they respond?

Expect to contact sponsors 7-8 times before getting a response, but most people give up after 3 calls. John Viscardo emphasizes: 'I expect no one to call me back' - even people he's known for 20 years. Marketing managers are extremely busy with dozens of priorities each day. Don't get discouraged if they don't respond. Space out your outreach once every week or two weeks, consistently reminding them of your interest without being pushy. The key is persistence without being daily aggressive.