I reviewed the links that you provided and as you mentioned, we can view upto 100 pages of a seller's storefront.
Please know that, currently, we do not have a feature wherein the products of sellers beyond certain limit can be accessed on the store front. I understand that thousands of products of the sellers will not be displayed on the storefront. I apologize for the inconvenience and dissatisfaction this issue might have caused.
Please know, the listings that are not visible on the storefront can be viewed on Amazon.com through ASIN or keyword search.