Sammy, I can't let this go.
This basic design has been in use for almost 40 years. I have used some of these counters for hundreds of miles, even leaving some of them on for my training rides, which should not be done. I have never had a tang break when the counter was properly mounted. Over-tightening the hub nuts can bind the counter, so the wheel moves, but the counter disk moves slower, bending or breaking the tang.
Engineers did design the latest counter. Apparently you are not an engineer, nor did you stay at a Holiday Inn Express, or you would have noticed that the tang is cut from material in the disk. There is no more material to use for the tang, as it goes almost to the center of the disk. Second, it is "adjustable" by using the included wire connector. Third, the tang has a hole in it, so you can attach it to your spokes.
If you can come up with a better design, I invite you to do it. Until you have a better design, maybe stop to consider that, for what this is, and the price that is charged, this may be the best design for the application. Keep in mind that not all bike hubs and forks are designed the same, so whatever design you come up with must work on many different hub/fork configurations, and be affordable.
It is easy to criticize something. But, unless you have a solution, whatever you are criticizing may be the best solution available. If so, criticism is unwarranted. Critique is fine. Casting aspersions on the designers, who designed the latest counter on their own time, and put up their own capital for the manufacturing process, is not warranted, and is not in-keeping with the intent of this forum. And no, I had nothing to do with the project.