That seems like a good (albeit cynical) strategy to be honest. 80% of your users only care about 20% of the features, and by offering as many different services as possible, you minimize the number of purchasing decisions that customers need to make. Are all your offerings just OK or even mediocre compared to the competition? Yes. Do most customers care? No, as long as it's adequate and doesn't actively cause problems. I can think of many purchase/usage decisions of my own where I prioritize convenience over optimization, because the apparent return from optimization exceeds the apparent cost.

I mean, just look at the Amazon retail operation - everyone agrees that the website is tired, ugly, and slow, but lots of people still do all their shopping from there because they're used to it and it's easier than maintaining accounts with 15 different retailers with 15 different websites. Amazon's bottom line seems to indicate that breadth-first algorithms work well on problems involving human populations.