Many servers providing tools for runescape 3 have channels set to "follow" allowing people in their own servers to receive these callouts/info...
#Follow option for #Merch-calls
magic bloom
coral nymph
We use this function for the daily stock. Discord limits the amount of publishes for followed channels per hour. Due to the high frequency of merch and other calls, it would be more of a hassle to see that up now. Especially since merch is being removed in a month.