You seem to have gotten downvoted without comment, so let me chime in. He's proposing a FOSS client. There's no third party here, the client is using this softw

You seem to have gotten downvoted without comment, so let me chime in. He's proposing a FOSS client. There's no third party here, the client is using this software to breach their own ToS (supposing there's a clause in there by which you're only allowed to access twitter.com from a browser).