F1000 Series Promoter East Coast:
It is called "bonafide" Sponsors. A business that has a product or brand to sell, and promotes the brand by donating/contributing funds or products to the event participants. The business gets brand recognition. There is no way that IndyCar entry fees cover the costs of Championship money, it's the bonafide sponsors.
When you first announced the F1000 East Coast Series you listed many bonafide sponsors/partners. What happened to those sponsors/partners that you listed which is clearly listed on your F1000 website currently? There is no need to list them here, we all can see who you listed on your own website.
http://www.f1000champ.com/index.html
The probem Jon, is that all your credibility is lost. If you have incorporated your F1000 Championship as a business enterprise, you can write off losses. You file tax returns for profits and losses.
Bottom line is, you need to do what ever it takes to make good to the racers who entered your series whether it's your own personal funds or funds/products from your list of sponsors/partners.
I find it interesting that none of your sponsors/partners have come forward with cash funding or products to the entrants, past or future. Not one of the sponsors/partners that you list on your website has come to your defense in the controversy that has been created within the F1000 class.