Thanks for your feedback. You raise an important point that I tried to call out in my review:

"we see how a few strong performers drag up the performance of the entire portfolio.

Keep this is mind: Finding mega winners is a key part of Motley Fool's secret sauce."

and also:

"If you want to outperform like they do, you have to buy and hold a decent-sized stock portfolio so you increase your chances of getting one of their big winners, which drive the market-crushing returns of the overall Stock Advisor portfolio."

Motley Fool offers tools inside their website that allow members to model expected returns for portfolios of various sizes (based on their past pick performance). That's how they arrive at their 25+ portfolio size recommendation.

But I completely agree, if an investor wants to just cherry pick a few stocks, they're unlikely to replicate Stock Advisor's strong long-term returns.