Glad to hear your enjoyed the article,
“Not always the maximum value is possible in the shortest time”, indeed! It probably shouldn’t be so anyway.
It’s a two-way process…
On the one hand, early rewards — first-time users and short sessions — are the minimum acceptable value of a product (humans attention span is down to 8 seconds).
On the other hand, the more effort — multiple or longer sessions — the more value users should get. How likely am I to stop using a product that rewards any extra effort I make?
Success is all in providing value regardless of the time a user spends using your product.