Back in the 90s, people attend church or wedding, or other important occasions would use pipe and drape as decoration, however, they would mostly rather rent a pipe and drape than to buy one. This has been long since changed, just as other mass-produced items, pipe and drape's cost hase been dramatically reduced and pipe and drape have been more frequently used than before. All of these situation makes pipe and drape rental business now so popular.
After the rental pipe and drape business has faded, people who are skilled in this line of business turned their gaze on DIY pipe and drape, those people are long term pipe and drape user, they know how to build, install and they know their needs. DIY pipe and drape seems more reasonable, first pipe and drape system is not complicated: you just need four main parts - base, drape, upright, cross bar. Second, since you are making your own pipe and drape, you know how to adjust it to your needs.
But, making a pipe and drape is not that easy, you will need components, components that are sometimes are to make, especially the little accessories like adjustable clamps, hooks, bases, pins.
And therefore, a new kind of way has been invented: half DIY. The term means that you can make the pipe and drape parts that can be easily hand-made: like the pipes and the curtain. But then you could buy the little inexpensive parts from a store, like the clamps and such. This way you don't need to waste a lot of time and energy but you could also get your heart-desired item.