>>248163Because they are fun plants to grow indoors.
>>248436It isn't a scam. When you buy any random potato from any commercial source, they normally have sprout growth suppressors sprayed on them. These can be organic or not. So, buying organic potatoes from a non-DIY/home/backyard supplier might give you a bunch of potatoes that will just rot in the ground instead of sprout.
So, you buy organic seed potatoes so that you know nothing has been put on them to suppress their growth.
>>248436You want rare stuff? A genebank is what you want. Look at the PDFs of all the potatoes they have, fill out all the applications, and request what you want in the amounts you want. Time of year plays an important role, so you may want to email them about what you want and when it'd be best to request it. Best part is that it is free, the last time I checked,
http://cipotato.org/ 