Following the same criteria as in the OP, there are a total of 7.666 users with at least 1 positive available sMerit, adding up to a total of 37.464 sMerits (the original top 200 on the OPs list add up to 11.906 sMerits). We also know that the list cannot take into full consideration the airdropped sMerit, nor the Merit Source originated sMerits (thus all the main Merit Sources have a negative Available Merits score).

Now If the initial sMerit airdrop was of 600K (as per @theymos’s post from a while back), and the currently (as of last Friday) total of sent sMerits is of 274.008, then really the 11.906 sMerits on the OP list are a drop in the ocean comparted to all the theoretical available sMerit forum wide:

 600.000      sMerits Initial Airdrop
-274.008     sent sMerits (Merit Sources and regular forum members)
+137.000    Min estimate generated (first halving taken to its maximum theoretical degree, and not accounting for all the other halvings which I cannot estimate)
--------------------------------------------
462.992   Total unsent sMerits (*)

We could also add an additional for what the Merit Source aggregate pool may have now, but I don’t want to venture (although we could say at least another 5K-10K sMerits).

Now of course this is a rough estimate, and not all is sendable (inactive users, banned users, etc), but it kind of puts the 11.906 sMerits from the list in the 2,57% area of the total unsent amount of sMerit … Just the tip of the iceberg really. This is more important to me than a nominal shortlist in this case.