I bought multiple deals based on the exceptional price - however in using this tool - its been nothing but a problem. It appears that if you have duplicates or blank cells in a client file - they will block your account and consider it a violation of spam policy.

In essence you will need to pre-clean a file - check for duplicates and any other data issues.
I don't need to do this with other verification tools.

I think there data verification process is OK, just the way they validate your file prior to running the veriification.