In a past life I worked for a place who had a few hundred processing accounts to load balance it all out because their chargeback rates were way too high. If an account gets close, you just don't use it for a month, or you throw a bunch of "safe" recurring charges at it to dilute it, or you hold a batch and send them through right before the rollover. Lots of ways to play number games.
Most of the execs did go to prison though, so don't take this as advice, but to be fair, the processors are the ones who told them to use those tactics.
Ironically, they made so much money doing their regular business the owner bought a small US based bank and was running online poker processing through it.
When "black friday" in the poker world happened, the bank failed and everything fell apart, but so far as I know, no one involved was ever charged with anything related.
To be clear, it was a bad company. However, the bank 100% knew what was going on and the merchant accounts 100% knew what was going on. So long as they were making money, and chargebacks make them a lot of money, they were happy. In my opinion the people running the company were just naive enough to not know how to cover their asses as well as the money guys.
In the process two state AG's lost their careers, multiple US senators were implicated, a bank collapsed, there was kidnapping, human trafficking and drug running, and in the end created urban legends of gold bars being buried in the mountains to hide it from being seized by the feds.
I don't know of anywhere that has it all written out, but here's a related NYT story with a fair bit of it: https://www.nytimes.com/2013/06/16/business/in-utah-a-local-...
It's load balancing.
Source: Have a 30M+ people site that has been pinged by VISA itself for chargeback ratios ...
Who knows - I'm just spitballing. But there are signals one could look at.