> What is your take on ecommerce businesses that generate most revenue from a single platform, e.g. Amazon or Shein or TikTok?

It’s not something I do due to the “concentrated risk” you mentioned. Scaling can be done, sometimes quite easily and effectively (e.g., Amazon ads can be quite efficient at scaling).

In general, I try to avoid or minimize exposure to capricious single points of failure, especially in sales/marketing, production, and/or distribution. I consider most large tech companies to fall into the capricious category unless I have someone on the inside who can make things right for me. This access to insiders is not as robust as I would like, but I’m working on it.

All that said, I know plenty of quite successful business owners who have gone all in on a single platform like Amazon or YT.

Regarding the roll ups, i think many of the businesses were bought at unreasonably high values. The linked article refers to this.

Covid changed many markets, in some ways permanent, and in other ways temporary. I was passing a lot on what I considered unreasonable prices for certain businesses. I could have played hot potato, but there was no reason to do so.