Aug 19 12:05 Declare explicit column types so sparse columns stop breaking parquet conversion 12:02 Add all-adopters config, untruncate comparison group, shorten title, add access section all-adopters holds the full 14,697 detected adopters. The comparison group is restored to its full 10,938 rows now that neither side needs truncating. default is unchanged for existing users. 11:52 Add commercial CA comparison group (7,138 organizations) Matched on employee band, company info requirement, collection period and website popularity range. No domain overlap with the adopter file. 11:41 Clarify that rows are ordered by website popularity rank 11:35 Add August 2026 collection date 11:34 Correct scope: 5,000 large companies and organizations, not a top-5,000 ranking 11:30 Remove duplicate xlsx, simplify card wording 11:23 Add citation and source link, correct field documentation, declare CC BY 4.0 11:00 Upload Lets-Encrypt.csv 10:56 Update README.md 10:54 Upload Lets-Encrypt.xlsx 10:53 Update README.md 10:51 initial commit 
