I view it as two separate categories; donations & support contracts. Donations are a thank-you payment for the code as it exists today. If someone finds it use

I view it as two separate categories; donations & support contracts. Donations are a thank-you payment for the code as it exists today. If someone finds it useful or includes it in their commercial product, give me a donation to reflect that thankfulness. It doesn't get you anything in the future, it is a payment for what exists today as-is today. If someone wants a guarantee of future work, whether features, bugfixes or support, that requires a support contract with a much higher payment and more formal terms. In that case, they can influence the future direction but it'll cost orders of magnitude more.