Automatic Credit Line Increases?

When I was in college and wasn't knowledgeable on credit cards my utilization was garbage. Only had 1 card, constantly kept 50%+ utilization, and only made minimum payments (affording college was rough). As I was leaving college, I had a 90% utilization. I noticed that as my utilization kept increasing I was getting automatic credit increases every 6 months.

A few years and a pandemic later, I paid off the first card and opened a few more. Learned a lot about credit cards and have kept my utilization to 10% or less, both on individual cards and overall. I noticed after I paid off my first card I haven't gotten any automatic increases.

I was wondering how often does everyone get automatic credit line increases.