I found the blog post to be very useful as someone who is in the process of building a product! I’m very interested in how you extended the AWS Activate Credits- was it difficult getting AWS to extend the credits over 3 years?

AWS Activate Credits conventionally run for one or two years, and then expire. Contrary to popular belief, you are eligible for additional credits afterwards, but they have to be greater than your previous grant. So you can't have a $5K grant and then another $5K grant, for example. If you want to stack them effectively, you (for example) get a $5K grant, wait until it runs out, then a $10K grant, and then a $25K grant if you can get one.