The context here is about increasing conversion rate, from website visitor to active, converting user. Or from passive newsletter subscriber to a lead (a user who opens the newsletter, clicks on the links, and converts). Here we will discuss the newletter conversion problem, although it applies to many different settings.
Of course, to maximize the total number of leads (in any situation), you need to use both seduction and analytics:
sales = f(seduction, analytics, product, price, competition, reputation)
How to assess the weight attached to each factor in the above formula, is beyond the scope of this article. First, even measuring "seduction" or "analytics" is very difficult. But you could use a 0-10 scale, with seduction = 9 representing a company doing significant efforts to seduce prospects, and analytics = 0 representing a company totally ignoring analytics.