It appears the issue is when there are AP or non-expiring ticket holders in the travel party, and the "regular" ticketholders buy Genie + in advance. We had that situation, so everyone just bought each day.
We had a party of 9 last week and were able to get Genie + every day of our visit and our top ride for the day right at 7:00. We did not buy in advance.
Have your tip board set up in advance with just the one/two selections are you are going for that day. Can edit later. Have one device showing time.gov and refresh when it is at 6:59:59. Have multiple people trying at the same time and see who gets in first. We always had multiple devices and it varied which day who would get it. Also divide up if you are doing ILL. we had four phones, two on each. Once someone gets in, the others stop.
If you don't get at 7:00, get it at 7:17 when more show up (maybe from the 7:00 failures).