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1. It's clear on the promotion "10% cashback on all your weekly tennis bet
net losses!" That's mean your network incorm (In-lose situation or not). Example, you're betting in "Tennis Match" with Total 5x Games with 2,000$ Wagering. You also lose some bet, but based on your net income of the week you deposit (In) 500$ and (Out) 530$ even you're losing some match. You're not qualified for the promotion, because your network is not on losing situation.
2. You have been warned, do not opened a multiple ticket with a same topic you're asking. Off course they're gonna to warn you, since you keep asking the same question while team already gave you some answer.
That is the important part though, if you are not making a total loss, then why would you get anything back to begin with? It means that if you made a loss, you are getting some of it back, if you haven't made a loss then there is nothing to "give back", because there is nothing to actually give back since it wasn't lost to begin with. This is a give back and that is why you should be giving something before they could return it back.
Hence, we shouldn't be expecting rewards just because we are wagering some money, that is not how this works and it wouldn't be possible for anyone to get that before they could see it like something of a gift if they realize that was the case.