Please suggest a platform that regularly runs promotions, giveaways, and cashback for losses. I’d like the cashback to be credited automatically without additional complicated conditions. I want to find a site where the bonus system works transparently and without unpleasant surprises.

Listen, I understand you perfectly. It's most annoying when they promise a bonus, and then it turns out that you have to wager it a hundred times or fulfill some crazy conditions. If you're looking for something transparent, check out platforms that offer “Real Money Cashback.” That's when the money is credited to your balance on a specific day, for example, every Monday, and you can use it right away without any “buts.”
Automatic accrual is a must-have. If you have to write to support or press the “activate” button every time, that's a minus right away. Normal services calculate your net loss for the week themselves and simply return a percentage. And be sure to check out the promotions section: if the last update was six months ago, there's nothing to catch there. The most active ones are usually those who constantly hold raffles on Telegram or social networks. The main thing is to read the fine print about the minimum amount of losses once so that there are no surprises later.