The usage limits described in Freemium Experience: More Features for All with Usage Limits apply not only to free users when editing the personal lists of free users, but also to free users when editing the personal lists of VIP users (collaborations owned by VIP users from the free users’ perspectives). I request that Trakt does not apply usage limits to free users editing the personal lists of VIP users.
My personal use case is that I (VIP) have a personal list named “Family watched”, to which I’ve added family members (free) as collaborators. They generally do not use Trakt for their own personal watchlist or watched lists. “Family watched” currently has over 100 items, which means that other family members have to request that I make any additions to that list. I don’t wish to share my account password for this use case. I could roll a small, private, authenticated service that uses the API on my behalf, but I’d rather just ask here first.
I feel like this has precedent in that previously, only VIP members could add others as collaborators. I also would think that this family use case is a good way to get others to keep Trakt in their minds and potentially sign up for VIP in the future if they decide they like it. In my (anecdotal) case, my family members do tend to rate and add other media to their personal watched lists more when they’re in Trakt due to interactions with the family watch & family watched lists.