- Games.
- Gambling while rarely subscription based is usually paid for directly rather than ad funded.
- Newspaper subscriptions are no less addictive for news junkies than purely ad funded newspapers.
- I watch a lot of Youtube, far more than I used to before I started paying for the subscription.
- Netflix and in the olden days TV.
I'm not entirely sure what "insidiously addictive" actually means. I do sometimes scroll through some TikTok vids. I don't find it particularly addictive compared to, say, Hacker News.