Stats.
195 uniques from 1 slot (round 91).
US 62
RU 16
DE 14
CA 14
CN 10
NL 7
GB 7
ES 6
UA 5
others 1+
Paid 5.5 BTC. 0.0028 BTC per click. $0.2 per click.
Pretty expensive for text ad.
Actually it is 0.028BTC or ~$3 per click with your provided stats.