Yes, I noticed that too. If you want TS, then the TS deal is better. But if you only want ToneX stuff and want to limit your exposure to all the IK products and save some space, then this might be the way to do. The way I see it, $100 for just this, or $200 for this and Arc, PianoVerse which I really don't want to get into at this point. I have way too many pianos.
IK make a ToneX bundle on sale for $149 and you can use jammies to get it down to $100
https://www.ikmultimedia.com/products/tonex-signature-vol1/?pkey=txsc-signature-vol1
The only think that really interests me are 2 or the ToneX signatures. The rest of the stuff that in listed in there that I want I think I spent < $100 to get in total.
In my case, my T Racks licenses do not go two ways. i have TR6 max and have modules that I don't have in TR5. I have to keep remembering to not click on the TR5 version. It would be useful in IK were to just unlock backwards compatible.