Disappointingly poor performance. Cannot recommend
We recently ran an email / Facebook campaign to support clinical trial patient recruitment using Datasys' list of purported well-qualified leads (approx 13k opt-in email addresses) in our local area. After three iterations, there were no conversions resulting from the campaign and no other evidence of any activity beyond Datays' internal reports showing sent emails and open rates. It left us significantly out of pocket for the cost and many weeks behind on meeting our recruiting goals. While Datasys appears to be a legitimate company and this was our first campaign with them; we've never experienced a zero-response effort with any other marketing partner in our 15 years of operations.
By Scott