No, the items will always be available. Considering there are already over 200 such items and there will me many hundreds to thousands more it will be impossible for users to get the items they want if the items are limited.
I also don't quite see the point in limiting these.
We have so many limited items on KOfK already: The Monthly Treasures, all the event items, the Treasure Trove Items, the Digging Items, the Monthly Limited Food Shop and the Monthly Limited Troth Tent Items.
Users already have enough limited items to "collect" if this is what they want and already a quite ambitious task if they wish to collect all of these, so I do not see the need for even more limited items. At some point all these limited items won't be fun anymore, but will just put pressure on everyone making the whole experience less enjoyable.
Sure, users who are very active might often have more food than what is needed for these, users who have lots of $ to spare might have all the TT or MT they want, users who have 200 Knuffel might get the Knuffel items faster than the ones who just have 1 or 10. But there are also users who don't have that much time to spend here or don't have $ funds.
We cannot serve these people everything on a silver plate, some commitment is needed, but we also can not raise the standard to people who make 100 posts a day, are regular donators and have 200 Knuffel. We have to meet somewhere in the middle and I think, or hope, that with the amount of limited items out there right now we have done that.
but those who do not feed, they can turn to the market, since over time the items will not have a value and the work is dedicated to knuffel be in vain ...