I'd like to take a moment to thank you all for sharing your thoughts on this. I'm here to provide some clarification on QuickBooks Online Usage Limits.
Should you, or a client, be in excess of any limits mentioned in the usage guide, things will operate as normal as long as no changes are made to the number of these items. Additionally, the Limits Dashboard has been introduced in order to quickly and easily track an account's usage. This can be accessed by selecting the Gear icon, choosing Account and Settings and selecting the Usage tab. Also, any items, such as accounts or classes, that are made inactive will not count towards the limit. I'm including some articles which cover how to accomplish this:
I can assure you that your input is valued. The sharing of ideas and solutions is one of the many things that help to make the Community such a wonderful place.