Equifax Data Breach: Reason for Bizarre Credit Score Declines?

Seldom do I use my one and only personal credit card, provided by Citi®, so I was thinking that maybe the reason my TransUnion® and Equifax® credit scores, which use the VantageScore 3.0  scoring model, both experienced sudden and precipitous declines was because I was being penalized for:

• Too Few Accounts Currently Paid As Agreed: FICO® Scores consider the number of accounts that are paid as agreed. Your score was impacted because the number of these accounts is too low, or because you've missed payments recently on some of your accounts.

• No recent revolving balances: FICO Scores consider whether a person’s credit report shows recent balances on revolving accounts. Your FICO® Score was impacted because you are not currently demonstrating active revolving credit management.

 
Seems unreasonable to me that a consumer should be penalized for avoiding revolving credit, but that's the system folks (The above bullet points are from Citi / FICO / Equifax Bankcard Score 8.)

So, on a recent check, my scores bounced back to 800+.  A glitch in the system, or related to the Equifax Data Breach?

Credit Scores: TransUnion and Equifax VantageScore 3.0

And my Citi / FICO / Equifax Bankcard Score 8 score skipped higher, from 820 to 822.

FICO / Equifax Bankcard Score 8 credit score

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