Many times website and domain owners are forced to “sell” their websites /domain names. In most industries having more = more profit, but this is not true for more domains. Nothing illustrates this better than the thread.
“You just bought 8000 domains for $12,500 from a friend? At $1.50 per domain they are probably all useless. I’m sure your friend is relieved to be absolved from the responsibility of all those renewals of $64,000 (or more) a year. I hope you have thought about those renewals before you purchased these domains, and have the budget for that. I hope they’re .com and not .info domains. Didn’t you ask him where they were currently parked and how much the parking revenue was?”
So if you have a large number of domains and there is a possibility that they may be taken away or “sold” using dubious methods, it is best not to renew all of them. You will have the last laugh when the new “buyer” pays the thousands of dollars as renewal fees. And the “seller” can always register more domains with better registrars.