This is like a personal service for newsletters. While most of the exchanges and crypto media are allowing users to register their emails for their newsletter, yours can also be done but you said that it's going to have a 14-day trial for free and that means after that trial, it ain't free anymore. IMHO, this is actually a good service if you're for the fundamentals and I get it that you're likely consolidating most of the news and send it on a merged and batch to the people that will take your service. But if there's already a free service from those sources that I've mentioned, it's better to go on that route instead of paying. Like the typical person says, "why would I pay if there's one or two free?"

Here is my conversation with Biinance agent about newsletter, if you know how to set a notification to emaila please let me know.
09:59
Unfortunately, upon checking with our specialist team, at the present moment, Binance has no feature or function to provide such notifications directly to the users through email. Sad

10:00
However, you can stay up-to-date with our latest coin listings and other announcements by following our official announcement channels. This will ensure you're always informed about our newest features and updates

You forgot to tell on how much you're charging for this offer. It's best to give everyone an idea after the trial expires so that those that are interested with this has an idea if they can afford to continue the service if they happen to like it. And with your current state, do you have stats on how many people have already registered and availed your service? Telling that you'd send emails and alarms 2-5 minutes before listing, most of these exchanges will send notice earlier than that.