What kind of project announcement is this?
I suggest you learn about how some previous gambling projects make some announcements and also serves about their platform in this forum. You can check how interesting at least they are willing to attract the users. Although they are new, they know how to promote and ensure people to use their platfomr. If the annoucnement is only like this, I ma not sure it will be trusted enough. Moreover it only presess on the bonus that may be very interesting, but it seems not sure enough.