Thank you, Dario.

What would you recommend doing when subscribing in MERGE mode if we would like to infrequently add or remove items from the table?

We have a situation where many clients will want overlapping, but not the same data from a set. As such we want to avoid COMMAND mode for this case as it would lead to a large number of disparate tables that contain data that could be (and would be in MERGE mode) shared. This set of data will occasionally have items added or removed, but this will be very infrequent when compared with the frequency of data updates.

Would you advise unsubscribing from and resubscribing to the group when rows are added or removed?