The only thing we are sure is the one time bonus will be sent for Platinum and plus users. For gold and below users it will be reloads for week or 5 days.
This is not entirely true because gambling activities are very impact here if the user makes at least $1000 wager in a month they will get cash bonus not reload bonus
Reload Bonus only for accounts that do not reach monthly wager targets specifically for the gold level and below , I don't know how many monthly wager targets but I guess it is around $1000 to get a cash bonus.
Is there any official information about what you are referring to about the min wager of $1,000 to get coupon instead of reload?
I just checked about the monthly bonus https://stake.com/blog/how-do-monthly-bonuses-work but I cant find similar information to what you are talking about.
Where did you get information or where you heard about it?
As long as I know there is no wager target to get coupon monthly bonus, there are some users that I know (personally) with low VIP rank (gold and below) but they always get reload even if they wager few thousands $ during 30 days before the monthly bonus come.