Currently 100 Child ASINs can be monitored within the Spy. We are, however, planning extensions to this in the future.
Number of Variations in Right Column
The number of variations for each product can be viewed in the respective column of the Spy overview:
Unfortunately the tool has to be limitied in this way as the "crawling" of this information causes the largest effort for the system. Currently it is not possible to monitor single variations.
Once a product is deleted from the monitoring, its monitoring space will become available again immediately.