Huh. I hadn't looked at that number in a while. Weren't there something like 120 merit sources at one point?
Your memory is correct but the total merit sources was at 120 at two points at least: on 17/9/2018 and 22/12/2018.
Here you go (I posted link to this thread in my above post but it seems you did not notice it.)

The all time high of total merit sources is 131 (from my sparsely observation but it could be wrong).
Time-series plot:Updated data:. list id day month2 year date meritsource smerit, abb(30)
+-------------------------------------------------------------+
| id day month2 year date meritsource smerit |
|-------------------------------------------------------------|
1. | 1 24 1 2018 24jan2018 35 8125 |
2. | 2 26 1 2018 26jan2018 49 9025 |
3. | 3 1 3 2018 01mar2018 57 11975 |
4. | 4 12 3 2018 12mar2018 77 17650 |
5. | 5 22 3 2018 22mar2018 80 17800 |
|-------------------------------------------------------------|
6. | 6 18 5 2018 18may2018 80 18500 |
7. | 7 6 7 2018 06jul2018 82 18900 |
8. | 8 11 7 2018 11jul2018 83 19100 |
9. | 9 17 9 2018 17sep2018 120 23045 |
10. | 10 17 11 2018 17nov2018 119 22045 |
|-------------------------------------------------------------|
11. | 11 22 12 2018 22dec2018 120 22055 |
12. | 12 5 1 2019 05jan2019 123 20735 |
13. | 13 6 2 2019 06feb2019 122 20835 |
14. | 14 15 3 2019 15mar2019 130 20605 |
15. | 15 27 6 2019 27jun2019 131 21045 |
|-------------------------------------------------------------|
16. | 16 30 10 2019 30oct2019 130 20895 |
17. | 17 14 11 2019 14nov2019 90 18821 |
18. | 18 15 11 2019 15nov2019 98 21671 |
+-------------------------------------------------------------+