If lenders view lending as a business, then surely there is a risk model they use, however basic and erratic it may be when it comes to this section. I would even go as far as to say that knowing the lender personally increases confidence, but not the likelihood of repayment. Past performance in terms of trust is no guarantee of future performance, only past performance in repayment - that's how the lending industry works.
But as pointed out above, don't use metrics that benefit scammers - scammers rely on the hope that lenders make this mistake. Do what the successful ones do and simply don't accept accounts as collateral.