QB Issue Resolution:

Can you provide the link? It might only be visible to people with an account (I do not see any reference to QB on cibc.ca or even cibc.com here in US)

But my hunch is, like even promos offered directly by Intuit that it may be only for new QB accounts

Your best source for fine print on that promo will be cibc and not intuit

Resolution for Issue 'CIBC clients can now save up to 70% off QuickBooks® Online, how can I apply this discount to my existing QuickBooks Online account?' available: Yes (Solved).
Source: Intuit Community forum.

CIBC clients can now save up to 70% off QuickBooks® Online, how can I apply this discount to my existing QuickBooks Online account?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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