There are literally hundreds of alternatives sprouting from the ground as raw materials and services become cheaper and cheaper. Amazon certainly hasn't monopolised on the computational power market.
Increasingly, much of the computational power is becoming decentralised anyway with the blockchain emerging in new and creative ways
Yes, it's a paid service, because they used their initiative, knowledge and finance to physically build their data centers. If that's what you are referring to by 'owned by Capital'
Increasingly, much of the computational power is becoming decentralised anyway with the blockchain emerging in new and creative ways