Difference is Amazon spent a lot of it on durable infrastructure (datacenters, servers, fulfillment centers). I don't know how Twitter spent its money, but see

Difference is Amazon spent a lot of it on durable infrastructure (datacenters, servers, fulfillment centers). I don't know how Twitter spent its money, but seemingly on undifferentiated software (i.e. not durable) or moderation? Both of which are recurring expenses.