That seems nitpicky. The free tier is a marketing program, not a product.
"Google should offer intro discounts" is IMHO a very valid point (absolutely no idea why this doesn't exist), but it doesn't really speak to whether or not the real product is more or less expensive.
it's a bit different because the free tier for dynamodb is not like the other 12 month limited offer, it's marketed as free forever, so it's not just an intro product, it's something you can run a small business off for free.
"Google should offer intro discounts" is IMHO a very valid point (absolutely no idea why this doesn't exist), but it doesn't really speak to whether or not the real product is more or less expensive.