That one is needed especially that lots of people seeking for good offers from the casino so better they try to have something to attract people to gamble on their casino. They are new and must impressed people to lure them on their platform since running a signature campaign is not enough and they need to exert lots of efforts to offer good bonuses also many giveaways so that they can increase more their engagement also their exposure not only in this forum but also on other social media sites.
Different companies have different budget to start and a new company does not need to do exactly same things like other older and more successful ones. Doing this will make your new and possibly small business collapsing very quickly.
If a team did diligent research on the market, the industry, and carefully plan their business development and marketing, I think success will come gradually but sustainably with time.
We've seen a lot of casino fall down for not performing good and rely on short term campaigns so they better learn from those mistake then create something that can make people excited when deciding to play in their casino.
With short term campaigns, they won't receive many or any good effect, hence I don't say they fall down by relying on short term campaigns. They mostly fail to build up good and attractive platforms because internally they don't have good and capable team for developments and other things related to their business. Marketing is only one piece of a business and you can not run very big and long lasting campaign to bring success to a bad platform.
Success comes from many factors that need to be good and combine with each other well, only one good piece is not enough.