[YolandaGraves56]

Ask whether the provider updates their database regularly. Fresh data usually performs much better.

 

[JeffreyRodriguez4]

If possible, test a small package before committing to a larger purchase.

 

[MistyBruce]

A trustworthy provider should be willing to answer questions about their data collection methods.

 

[lramirez751]

Building your own subscriber list may take longer, but it's often much more valuable over time.