Very common. All of GMK are this. Most of SPs stuff too. Like all the SA caps, except the dye sub PBT ice caps.
PBT double shot is technically harder due to warping, but mostly not an issue once you have that down, but over all dye sub is easier, cheaper and more variations easier. The only downside is only being able to have legends in darker colours than the caps, with double shot you can do lighter legends.
The best is PBT double shot with Dye sub, sub legends.
It is usually the cheaper Chinese stuff that is double shot PBT oddly. Like the Tai Hao caps and all those PBT POM shine through double shots.