Everyone here arguing that they may not have much sMerits to send but we need to accept the fact they were not spending most of their monthly allowances to merit the forum members
When theymos last created some new merit sources, some sources who were regularly exhausting their supply were handed a 2x or even 3x increase in their source merit allocation. However, the total number of source merits stayed pretty much the same, so a number of sources who weren't spending all their source merits must have had their supply cut significantly in order to compensate.
Only theymos knows the exact distribution, but I suspect the number of sources with a relatively small allocation is higher than we think.