So it's not possible. So what? What is your point? We are back to square one. What conclusion are you trying to draw from the fact you can't set up 500 servers in 24 hours?
Are you trying to say it's unfair? I just don't see it that way. If Amazon violated the terms of their agreement then fine, let it be litigated. But if Parler can't get back up quick enough in the mean time that's on them. That's how business works. I know. I conduct it. It's not personal.
You are connecting unrelated dots. While it could be argued that the "cloud provider" space is an oligopoly (though I would not argue that), simply deciding to not serve a specific business, even as group, is not an antitrust issue. No business has a "right to service".
Antitrust is more concerned with anti-competitive behaviors: pricing-fixing, group boycotts[0], buying a competitor with the express purpose of removing competition, etc. Amazon and Parler are not in the same market - they are not competing for anything. Antitrust is not going to be a fruitful legal avenue.
If Amazon were somehow influencing Parler's ability to "do it themselves" (e.g. preventing a seller from providing them with boxes), then yes, there may be some legal standing.
[0] Look this one up. It's not what you are thinking.
Are you trying to say it's unfair? I just don't see it that way. If Amazon violated the terms of their agreement then fine, let it be litigated. But if Parler can't get back up quick enough in the mean time that's on them. That's how business works. I know. I conduct it. It's not personal.