Don't let expectations cloud the results. Don't get discouraged, make changes. Pulling out in the middle can be very damaging to the recipient. Watch for unhealthy co-dependency between your business and the recipient. A healthy business can't survive in an unhealthy commnity.
Consumers vote with their dollars.
The more you teach, the more you learn. Develop a focus for your contributions. Sponsorship is also a marketing expense. Don't set expectations to high. Mandatory employee involvement can create resentments.