[mbucc]

Last month Forbes reported that Netflix said 75% of what it's customers watch are from recommendations. Definitely some bang there.

Also, note that 10% improvement was far from linear: year 1: +8.43%, year2 +1% and year3 +0.6% (!!).

[kds]

An interesting observation, indeed - so the enhancement opportunities were effectively explored within the first year or so. The next two years count for far less, though I guess the cleverest approaches started to emerge just then.