One other thing. This phenomenon of massive refusal rate is quite recent. The rate of approval in Ghana was higher previously. From 2006 to 2014 the country was getting about 1500 to 2500 visas in general. DV2014 the number of issuances was 1460. Then in DV2015 the number dropped to 526. Same number of cases, but a massive drop in approvals. This coincides with the introduction of the DS260, which allowed more computerized operation (the nemesis of fraud).
Susie mentioned earlier the role agents have played in this chaos. I had noticed that rise some years ago through entry numbers and asked Ghanaians about it then. What I had noticed was that starting around 2009 the number of entries from Ghana has increased massively, but tellingly the ratio of derivatives increased incredibly (not credibly).
In 2007 there were 210,000 entries plus 80,000 derivatives (so a derivative rate of 1.38). That increased rapidly so by 2015 there were 1,537,000 entries and only 192,000 derivatives (a rate of 1.12). That just doesn't make sense - other than it meaning agents were entering large numbers of entries for people without including spouses and children.
It also meant that out of 1.8 million entries in DV2015, only 526 people got visas (0.03% or 1 person in 3300 entries). Compare that with 2008 where there was one visa awarded for every 161 entries.