I ask this because I do not think that I checked any of the emails so far, just go to bottom and do my WOF and leave, that's about it without anything else, no idea what you are sending with those mails.
As long as you click on the email and visit the site afterward then it works. The main point is to get engagement from those promotional emails so as long as you keep on clicking the content of those emails then its all good
I know it is simply just 50 satoshi but you are sending these to god knows how many thousands of people every day, people claim maybe half a bitcoin a day total?
Freebitco.in gave tons of money every hour from the free claim and on top of that there are tons of people getting paid from refferal link so its not an issue for them. Aside from that, there is a minimum threshold to withdraw all those satoshi and RP so as long as people keep coming back for more either through the WoF or free claim then its great for the site.
Its a small price to pay for all those engagement