A quick plugin I wrote for SourceMod. When a client joins the game, it will open an MOTD window with a Discord invite link or anything else you want. Comes with many features. Supports menus, cookies, and more.
sm_doc_enabled=> Enables plugin (Default: 1).sm_doc_title=> MOTD window's title. (Default: "Join our Discord server and get free rewards!").sm_doc_link=> Discord invite link. (Default: "https://discord.gg/MnPD6BG").sm_doc_menu=> Show a menu stating to join the server on connect? (Default: 1).sm_doc_notify=> Notify the client that we invited them to our Discord server whensm_doc_menuis set to 0. (Default: 1).sm_doc_prevent_multiple=> Prevent more than one invite per user. (Default: 1).sm_doc_goto=> Go to another URL after opening Discord link two seconds later (silently). (Default: 1).sm_doc_goto_url=> URL to go to if 'sm_doc_goto' is set to 1. (Default: "https://GFLClan.com/").sm_doc_hook=> Hook to use when presenting menu. 1 = Hook->player_initial_spawn. 2 = OnClientPostAdminCheck. (Default: 2).sm_doc_wait_time=> Wait time when using '2' assm_doc_hook. (Default: 10.0).