This legit especially their big event such as Easter, Halloween, Christmas event that usually rewards users with cash drop without wagering requirements and other rewards such as free bet and free spin.
Although the recent years they gradually change their mechanics to challenge type that requires more wagering to claim the prize which gives a hint that they already starting to become less generous on their promotion.
In general, now is a difficult time for many people from an economic point of view, it is worth remembering just what literally recently was the market, it is now we see the positive, and not so long ago some people were just decadent moods. So it makes sense that when everyone was doing well economically, the promotions were much more generous. And now people are used to fancy bonuses and are already resentful when they are made more modest.
I think they are cutting cost now on their marketing because they already have good amount of active players that loyally playing.
Yes, perhaps marketing costs are being reduced, but it is more likely that this was a consequence of the economic crisis, rather than it is done due to the fact that the customer base is already wide.