AWS has programs such as Activate and partnerships with companies like WeWork to provides startups with credits to consume AWS. 

AWS Credits cannot be applied toward the upfront cost of RI purchases. However, AWS does permits credits to be used for No Upfront RIs and Savings Plans. 

Purchasing No Upfront RIs and Savings Plans significantly reduces the burn rate of the credits and Reserved.ai offers its automated cost optimization services for free as long as a startup is on credits

Did this answer your question?