I got to say these last few days have been quite an adventure!
Turned out that Success' design worked out pretty well on getting people onboard but also recommending it to their friends.
I had a few cases of users sharing the word simply because they loved the design and how it "felt".
This seems to be quite a common pattern, especially on iOS. You need to put great care in design since every user nowadays has high standards. Lesson learned: the package matters, a lot.