Why is Coinbase charging $30 a month?

Excuse me, but could you clarify why Coinbase is imposing a monthly fee of $30 on its users? It seems a bit steep compared to other cryptocurrency platforms, and I'm curious about the specific reasons behind this decision. Are there any enhanced services or features that justify this cost, or is it simply a measure to increase revenue? As a user, I'd like to have a better understanding of the value I'm getting for this subscription fee.