Well, if they do not offer betting requirements, yes, it is as you say, it is free Money, but as long as the player can win, otherwise no, this is something that can happen but I have only seen it in 2 casinos once, and in Everything was fine in the first casino, but in the second casino that I had the experience it turned out to be a scam, that is why when they give me a lot of good things it is rare, it is Strange because something does not look good,then in those moments is when certain care must be taken so as not to fall for scams.
And it's true if there's something that being offered which is not attached to any casino requirements too good to be true as we know that casino is a business and they will not just give you free money unless they are trying to work with their reputation and they have a good amount allocated budget to cover but for sure it will not that much and it will not last long.
Weekly promotion or bonuses is what I like and what's on my mind is something like a rake back or free bet depending on how much you wager on that week and of course you should have a wagering requirement as many user would probably take advantage on that kind of bonus considering that it is a weekly bonus.
But usually, to get a weekly bonus, a level requirement or a percentage of your account is required, which will be calculated by how many bonuses you can get. If you are a small gambler who never or rarely bets big money, you will likely not meet the weekly bonus requirements. But it also depends on the policies of each casino towards its members. But you can still get promotions from programs offered by casinos, so you can take part in every promotion at the casino, of course, with the terms and conditions that apply.
Depends on the requirements and your activities inside the house. If you don't meet that said requirement, then expect that you might not get anything. It's an additional perk that accompany by wagering or activities that you are doing inside the house.