“Which” is used to add parenthetical commentary to a noun. “That” is used when the relative clause is restrictive: the clause disqualifies some members of the larger set of objects to which the noun refers. Since LWers are not interested in all stories, but only a special subset, you are correct to use “that”.
“Which” is used to add parenthetical commentary to a noun. “That” is used when the relative clause is restrictive: the clause disqualifies some members of the larger set of objects to which the noun refers. Since LWers are not interested in all stories, but only a special subset, you are correct to use “that”.