We store your data in encrypted form (AES-256), and only the bot has access to it when logging into your profile. Even if we manually open the database, we won't be able to read it without a secret key, which is stored separately from the database.
Be sure to set an end date for the range, otherwise the bot may book you for any available date in the future, even a year from now, which may not be relevant.
For example, if you purchased the notification service for one applicant for $40, then within a month you can arrange the automatic booking service by the bot for 1 year for $40, without overpaying.