There are a few reasons why this can happen. Most of the time, the reason for not being able to see many shifts may be that it is a quieter period (January and February for example). Some shifts get filled very quickly, after which we pause them so you will be unable to see them after this.
If you have failed to show up for a shift you may have been deactivated from our system – you will have been made aware of this, and unfortunately, we will be unable to offer you shifts going forward.