This has been repeated several times now, but an important reminder: Meta doesn't need Threads to mine your data. Lemmy has been designed to be very easy to scrape due to its open APIs. Don't worry yourself: Meta can, will, and is already scraping all of your data from the past and the future. They may not be able to see granular data such as posts you upvote but your comments and posts are already a goldmine of data for Meta.