Great feedback, I don't know what your tour looked like and what the level of text was but I would hope that by keeping the individual points very simple and visually attractive they would stand a higher chance of being read?
I don't mean to suggest that interactive tutorials can't ever work, but they were a huge failure for me. The only upside was that several people contacted us specifically to mention how awesome they thought the tutorial was. However, most of those people seemed to be other software developers that were interested in doing something similar. They didn't seem to actually be any more likely to subscribe.