Correct, and nobody has ever denied this. Scent-Lok/ScentBlocker suits using activated carbon have a lifespan of a few (3-4) seasons when used properly. Every time you regenerate the garment it loses a little bit of it's effetiveness. Look at the charts they've published on this, it's not like they're hiding anything.

However, please keep in mind the amount of scent molecules that are being given off by a single scent wafer versus those being given off by a hunter who is using scent-free soaps and only using the garment for a few hours at a time. I have some scent wafers in my bow case from more than 2 years ago and every time I open it up it's like a punch in the face of HS Fresh Earth scent. Those things are pretty potent, and they're going to fill your suit up quick. Not to mention if you store in the container and fill up the suit you need to regenerate it before using it and you're not going to be doing that in the field or on the side of the road at 4 am.