GreyArea:
I don’t know if they have the “per LED” capacitors, it doesn’t say, but there is a component of some sort on the strips other than the led itself. Does anyone know what it is?
Those little brown cube thinghies with silver ends are decoupling capacitors for the driver chip inside the LEDs.
The resistor in the data line is to protect the first LED in the strip.
A buffer cap (large, electrolytic) across strip supply is to smooth the Trinket/strip supply when LEDs are turning on/off.
Both above parts are also there to protect the strip in case of long-ish wiring between Trinket and strip.
Leo..