I see that the 1-bureau monitoring plan gives you monthly access to your EQ report. Conversely, the 3B product gives you quarterly 3B reports. Personally, I think quarterly reports are not nearly frequent enough. The idea I have strikes a middle ground between the 1-bureau monthly option and the current 3B quarterly option.
Perhaps allow 3B users to access one of their bureau reports monthly. For example (illustrated below), month-to-month, users would be able to choose whichever bureau they wanted to see.
January - maybe I decide to look at Transunion (for some reason)
February - check Transunion again
March - whatever issue I had with Transunion has been resolved; I'd like to look at Equifax this month.
April - haven't looked at Experian in a while; maybe I'll take a look.
This sounds feasible/reasonable to me, cost-wise, for myFICO and provides more frequent updates for users subscribed to the most expensive plan.