I just saw your thread on the CS forums and would like to explain the following:
Each month if at start of the month your account is in good standing you get 500 tenders.
Additionally, you can earn 500 extra tenders per 200 challenge points for a total of 1k tenders per month. You can see this spaced by the gaps at the Tenders journal by comparing the score versus the tender diamond reward below the bar.
I also answered a similar player’s concern here who was confused as you were: