BetWWTS Reload Bonus

BetWWTS.com has the following statement in their “bonus rules” section:
Q: Do I get a bonus every time I reload my account?
A: Not every time.
What is that supposed to mean? How do they determine it then? Is it just completely random? Do they have a circus ape in the office randomly selecting bonus accounts? I am very confused by the whole thing. If you don’t provide a reload bonus save for promotions, just say so. There’s no need to beat around the bush. Some sportsbooks, after all, don’t need the gimmick bonuses in order to attract customers. The BetWWTS.com site is legit, so people respect BetWWTS.com for their payouts and service.