I remember reading about the horrors when people could not source ABC reagents from neptune before ABCreagents came out.
There was a supply issue for a bit but that is somewhat to be expected with new products. We also have to factor in hobbyist exploring testing schedules and the one off manual tests. Everything starts to add up which caused a ripple effect of it being launched overseas.
I am not making an excuse just providing some possible insight or at least "my" opinion. I do not work for them just what I remember from some of the various discussions. If you look today there are no issues trying to find brand reagents.