From the Terms & Conditions, which is right above the survey:
Terms and conditions.
Only currently supported versions from scientific research software vendors that run on HP-UX 11 platforms qualify for benchmarks. To receive your free HP 32SII Scientific Calculator, your company must be considering an acquisition of a HP 9000 N-Class server and you must be directly involved in the decision/selection process. Benchmarks will be scheduled according to Hewlett-Packard Company capacity requirements. Hewlett-Packard Company reserves the right to refuse to perform any benchmark if it does not meet our benchmarking qualification criteria.
They perform the benchmark. It must be scheduled. No benchmark, no calculator.