I’d hate to be their IT department right now. If they are truly using Amazon services they should be wary that they will probably be deplatformed outright in a matter of hours.
Don't think that's not coming, and I'd hope for Parler's sake they have a Plan B to restore service when it happens.
Anyone remember what happened to GAB when they got too big for Twitter/Google/Apple? Deplatformed. They've never recovered fully either.