There is no cost associated to Lakebridge, it's free to use.
Currently for Redshift only the Analyzer is supported ; the converter should be available later this year (it's on the roadmap, no promise on date).
For larger tables, it's faster to compute the approximate count distinct rather than the exact value.
The difference of the actual number won't change the query plan - the optimizer usually choose by looking at order of magnitudes rather a specific t...
