The message was sent to around 4000 addresses and I can say that it got probably a 0.2% conversion rate on the number of emails sent.
I do believe that around 25% of emails were opened, so that's 1000 emails - now this gives us a very different conversion rate of around 1%.
So, with this new offer, I believe that around 100 people are exposed to the ad on the site every day.
After 4 days, that should be around 400 people.
If the conversion rates are similar, this could mean 4 sales.
That's what I need to test in that period of time: does the same ad, directly on the site create a similar response or not... we'll see
I have to wait another 3 days and check results then.