>>3885066The fact that you don't recognize why she did that shows how little you understand of the business.
If she had just started her own stream, then you could have said that she's not fit to be a vtuber. Ina is a pro, so she understand the value of collaboration and intergenerational cross-promotion. By first going to Kiara's stream she managed to gain impressions with Kiara's audience, which will in the short or mid term boost her performance on youtube and the amount of money she's bringing in for the company. It also made her look good, because it showed that she appreciated the work Kiara did for her.
It was a very professional move.
Say what you will about Ina, but she is the most professional among the HoloENs and she understands one of the core appeals of the business. The interaction between different talents.