That link contains one suit on grounds of ageism and the plaintiff clearly lost:
In 2013, Pechman dismissed all causes of action except for a breach of contract claim against IMDb; a jury then sided with IMDb on that claim.
Then after the plaintiff refiled the suit:
"All claims against IMDB were dismissed by the court in March 2015, handing Hoang zero damages.[41]"
That is the only suit regarding ageism for IMDB which is a 26 year old company.