I made the QSL card, and also ordered a VSA callsign stamp. Most of the cards I received previously had a signature and callsign stamp on them. After looking at several companies that make callsign stamps, and getting advice from some senior members, I finally ordered one from BH1VSA (the stamps on most of the cards I received were from him).
There are a few knock-off versions of VSA available on the market. While these copies may not be as refined in terms of layout and visual comfort, at least they don't engage in copyright infringement or piracy.
There were also other original designs, but when it came to aesthetic design, VSA's traditional approach seemed more appealing. Senior colleagues also mentioned that the VSA design team was more professional and had experience with national-level design projects. Additionally, someone named HAM stated that VSA's manufacturing equipment was industrial grade, resulting in higher quality and better performance compared to other workshops.
In reality, if most HAMs choose VSA, then it should be a good choice. I decisively ordered it, and the product I received was much better than the cheap products that other friends had ordered.

