step1
Sold (bought) data - Data 3 Laws - Anonymization - Data combination - Typing - Targeting - Matching
vs
(Low-cost) data to buy - Matching
step2
Daily log - Type analysis - MyData - Type market (NFT) - Purchase/sale (designated target, timing, price range, quality, expiry)
Keep list - Grouping (same product or type among app participants) - Product composition - Our (social) data - Type market (NFT) - Reverse auction - Purchase/sale
...
