This is a bad decision... Some people don't know their free time in advance. They literally know it on a day to day basis. This policy is ill-conceived.
The new iTalki is horrible, in fact, I'm not even using the new/BETA version at all. I'm still using the classic site cause it's more convenient. I still can't get over the fact that instant tutoring is gone. My students who took instant tutoring classes with me said that they don't have time to schedule lessons so iTalki just robbed them off the opportunity to talk to tutors/teachers right away. iTalki's being unfair to everyone- students and teachers/tutors alike
I don't know why they removed it already but they said that they will replace instant tutoring by another feature in the future.