I guess like all things, small is relative.
I helped a company once design / test / market a product. The design started in 2015, was finally ready for sale in 2017. I left the company in 2018, we had sold less than a dozen. Being personally involved, I oversaw at least $1M in design cost, testing, prototypes etc. One item required for testing cost $100K alone.
While it wasn't entertainment related, it was still UL. We actually had to use ETL for the actual cert, UL could not figure out how we needed to test our product despite them having written the standard we were building to. Further, there were only 8 components of our design.
Next time you purchase an electric component for your home / work, I'm betting if you find a certification tag, it is going to be ETL. I've not actually seen any new electrical product I've sourced in the past few years with a UL tag. They all seem to be ETL these days.