A welcome offer is worth what its terms let you keep, and the number in the advertising rarely decides that. An offer is therefore read from the conditions towards the amount, not the other way round.
What the offer actually gives
The ceiling on the welcome offer is 1.000 RSD. It is activated by a first deposit of at least 500 RSD. 200 free spins are part of it too.
The amount and the spins are the face of the offer. What decides whether you keep any of it sits a few lines further down, in the conditions.
The number that decides everything
The multiplier is stated in the terms of the offer, and it is the first thing to look for there. It pays to run the numbers before accepting, since they are unforgiving: 1.000 RSD of bonus at 30x asks for 30.000 RSD of play; at 1x it asks for 1.000 RSD. Those are not two versions of one offer.
What else is in the rules
The multiplier never arrives alone, and the other three decide whether it is reachable at all. Minimum odds filter which tickets count, so the turnover has to be built on real risk rather than on near-certainties. The deadline shows whether you can get there without raising your usual stakes. Last comes game weighting, where slots usually count fully, table games partly and some games not at all. Each of the three is worked through in wagering requirements.
The one-account rule
Only one offer from the menu goes to each account; the rest do not stay in reserve. The first welcome credited is also the last. This is standard across licensed Serbian operators, and it is the single thing most new accounts get wrong, usually by taking whatever sits at the top of the page.
It has one practical consequence: when an offer depends on how the first deposit is made, the method is decided before you pay in, because it cannot be applied afterwards — see how to deposit.
After the first few weeks the welcome offer leaves the arithmetic exactly as it was, since the margin sits in every price. Budget first, then the offer that matches how you actually play. What is running right now is on the bonuses hub.