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Is basic: Specifies whether the subscription is a basic one (available through the main site) or an enterprise edition (created for a specific user). If the checkbox is checked, the subscription will be visible for all users in the Subscription section. If it is disabled, the subscription will be visible only if it is active at the moment.
Is limited providers: Defines if the user has access to limited providers or if the whole set is available.
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Is subscription warning sent: If the subscription is to be canceled for some reason, a notification mail is sent. When checked, it means that the email had been sent. Do not check/uncheck this checkbox manually, it is a system parameter.
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