CLUB ANSWER
Is a seamless pattern subscription cheaper than buying patterns one by one?
A subscription is cheaper when the individual files you would otherwise buy cost more than the membership during the same period.
Start with the real project list
Count the patterns you expect to use this month, not everything that looks interesting. Compare that basket with the fixed $10 monthly Club price.
Include future revisions
Client revisions often require new colors, motifs or alternatives. Access to the complete Club catalogue reduces the cost of testing those options before approval.
Choose the shortest sensible term
Use monthly access for a short project. Choose annual access only when work continues across the year and the $36 saving is likely to be useful.