[GJim]

> So TikTok

Is a video sharing platform.

> rarely post about their social life

Note your correct use of the word rarely and consider my comment about crossover.

> Twitter

Xitter is a 'micro' blogging site.

> most people don't post about their social life

Again, note your observation of the most common uses of that platform and consider my comment about crossover.

[Karrot_Kream]

Based on my understanding of your comment, the crossover exceptions dominate the discriminative power of the categories, so the taxonomy feels useless.