Update minimizing-costs.md

Author: tunetheweb

src/content/docs/guides/minimizing-costs.md

@@ -138,7 +138,7 @@ LIMIT
 
 ## Use RANK
 
-An alternative to `TABLESAMPLE`, to get a consistent set of data returning for a subset of data, is to use the `rank` column as mentioned previously:
+An alternative to `TABLESAMPLE`, to get a consistent set of data returning for a subset of data, is to use the `rank` column as mentioned previously. For the top 1,000 or even 10,000 sites:
 
 ```sql
 SELECT
@@ -163,6 +163,20 @@ Table names correspond to their full-size counterparts of the form `[table]_10k`
 
 In reality as `rank` is part of the clustering of the tables you don't need to use the `sample_data` dataset. However, due to inaccurate estimates mentioned above, the `sample_data` dataset is safer since it only contains 10,000 pages so even with inaccurate estimates it will be smaller than the full `crawl` dataset.
 
+## Whether to use `TABLESAMPLE`, `rank`, or `sample_data`
+
+This comes down largely to a matter of personal preference. Each has their advantage and disadvantage.
+
+Advantage |`TABLESAMPLE`|`rank`|`sample_data`
+----|---|---|---
+Consistency of results returned|❌|✅|✅ (if run in same month)
+Accurate estimates|✅|❌|✅
+Ease of commenting out for full run|✅|✅|❌
+Allows querying of any months|✅|✅|❌ (previous month only)
+Allows variable sample size|✅|✅|❌
+
+If they ever fix the estimate bug then `rank` will be a clear winner. Until then use whatever works for you!
+
 ## Use table previews
 
 BigQuery allows you to preview entire rows of a table without incurring a query cost. This is useful for getting a rough idea of the data in a table before running a more expensive query.