I hadn't heard of this rule before (but I am just a novice at all this still).
When we stayed at AKV earlier this year on cash (with the DVC discount), we initially did not get daily housekeeping but when I inquired, it was provided. The front desk was very apologetic, and the housekeeping manager called us personally and was also very apologetic. They both said that because we came up as DVC members, we were put on the DVC schedule but they seemed to agree we should get daily housekeeping because we were paying cash. Anyway, maybe your results will vary. I was very impressed at the prompt and courteous response in any event.