[thelegendaryof]

local function DERP_OnLinkClicked1(link, button, text, color, linkType, ...)
    -- do your additional stuff
    d("DERP_OnLinkClicked1 on "..tostring(linkType))
end
 
local function DERP_OnLinkClicked2(link, button, text, color, linkType, ...)
    -- do your additional stuff both will be called
    d("DERP_OnLinkClicked2 on "..tostring(linkType))
end
 
LINK_HANDLER:RegisterCallback(LINK_HANDLER.LINK_CLICKED_EVENT, DERP_OnLinkClicked1)
LINK_HANDLER:RegisterCallback(LINK_HANDLER.LINK_CLICKED_EVENT, DERP_OnLinkClicked2)

No need to overwrite, hook or detour anything. Both will get called in addition
to the unmodified native code, no matter where you click on the Link.

Cheers!