I wrote a similar thread back in 2019 where I tried to find users who have earned a lot of merits but never sent anyone a single one. Maybe you have seen it. Feel free to check the names and compare it with the ones you found, maybe many of them match. The last time I made changes to it was in February of this year when I removed many users who started sending merits to others.

Top 200 Active Members who have earned most Merits but have sent 0 sMerits