The provider ought to be in a place to answer questions regarding redundancy, data continuity and precisely what occurs at the close of the contract term. As an example, an IaaS provider may not have the capacity to find and terminate the offending VM instance, and thus must terminate the whole support.
For instance, the provider will be liable for the Software-as-a-Service aspects, but the consumer could be mostly accountable for his VM containing licensed software and works with sensitive data.
Whether any 1 service provider is suitable is dependent on many things, the most notable being security of information. First of all, clients of IT service providers are interested in being sure the service remains up.