For two years, they used the card routinely, paid if off religiously...sometimes having a monthly spend three times the limit.
They would periodically request either a security deposit refund or to have their credit limit raised - more security deposit or not. Constantly denied, automatically, even when trying to escalate it with customer service agents. I forget the term, but when you essentially trade in one type of card for another from the same company - tried that too. Denied.
Finally, on a whim they tried another company, and got instant approval for an unsecured $3,000 limit card.
They stopped using the Capital One card except for a service or two that totaled $10, maybe $20/month.
2-3 months later, Capital One did a soft pull where the new card showed up and within days of the pull, refunds the security balance and moves them to an unsecured card with $3k credit limit.