I’ve noticed the same problem also with people. If their TMDB page doesn’t have an IMDB link, they are not imported into Trakt, and even worse, if they were already on Trakt, they have been deleted. This has definitely led to a lot of cast data being lost in Trakt, especially for people working on TV, who may not always have an IMDB entry.
@Sonply Do you think it would be possible to remove this IMDB link requirement at least for people? I don’t think there are duplicate or fake pages for actors on TMDB, so very low risk to import wrong stuff. IMO, the damage done to Trakt by the lack of actors in the cast listings is much greater.