He has never witheld a summary for clout.
He stopped posting for several weeks when people were leaking stolen HQ scans from Shueisha's database. Thats literally it. He gave a warning saying this shit will be ruined because thats how Shueisha takes action. He waits until this time to post summaries because LQ magazine raws release about 8 hours after. Ll, which Shueisha doesnt care about (magazine street date being broken around the world is something they cant control)
The mindset that Redon is some troll is frankly weird. Hes not part of any scanlation team hiding raw translations so people cant translate. He doesnt actually profit off of the summaries either. Sure, maybe he does make some money via twitter, but lets stop acting like the dude is witholding spoilers to make you specifically upset.
He has repeatedly explained why he posts when he posts.