it appears that if I purchase the 12 months I only get 26 subscriptions. However, a year is 52 weeks so why wouldn’t I received 52 subscriptions?

We only publish weekly reports…..the difference is that the 3-month subscription allows customers to ‘try’ our service with the option to cancel early.
The 12-month subscription gives customers a discount for subscribing for an entire year.
Either subscription provides a weekly update to our analysis in the member’s area or by weekly email delivery every Friday, so the annual subscription does get 52 weekly reports.