Previewing audio does not count as an export, you only pay for the audio that you export (download).
On Rumble Studio, you only pay for the audio that you export (download). An unlimited number of guests can participate in your interviews, and there are no limits (subject to fair-use policy) on how many hours of audio your guests can record.
To decide which segments to export, you can listen to a reduced-quality version of your guests' audio. Previewing audio does not count as an export, and you can do it as much as you like.
Each plan comes with a certain number of export hours. When you export audio, you select only the segments that you want, then hit the export button. At that point, the total duration in minutes of all these segments is subtracted from your monthly allowance. We keep track of which segments you export, so we will never charge you twice to export the same segments.