Thank you for sharing this feedback, it's something I was wondering. My thinking for this pricing is that if you just act on one of the signals and are right, you will hopefully have a return of more than a year's worth of subscription costs YMMV
For pricing context, FinViz elite (https://finviz.com/elite) costs ~$25/mo. Other, newer tools (Atom, Koyfin) are free. However, these are research tools, not notification tools. Anecdotally, notification tools seem to command higher prices.
I would guess that false negatives are your biggest churn risk. Meaning, subscribers will be angry if your list fails to cover one opportunity that they miss out on.
I think subscribers will (and should) also expect 0 downtime at this price. So, it may be better to focus on reliability over new feature rollouts. In this market, a plaintext email with companies, tickers, and list dates would be a significant upgrade over existing consumer (read: not Bloomberg) alternatives.
There is always someone who would have bought it for less money but who actually probably is never going to buy it at all. (Not referring to the OP at all)
Look at your funnel, test where appropriate and decision from there.
If it were me, I'd start on a leads model - see how many you can drive and get paid per lead, then switch to revshare when you're confident the lead quality is good.
You also then have a massive email database of users interested in financial markets and services (because it was free to sign up) - plenty of opportunity to market them there, products, weekly tips, whatever.
Better off doing a freemium model or a free trial and then upselling the customer once they've understood the value prop.
Edit: So for me it is mostly about curiosity and staying informed. Perhaps making occasional bets.
From the guidelines, although its not explicitly stated I would think your submission here is not really playing the game. Just a heads up (and I may be wrong, but that's been said before), best wishes with it anyway.
Show HN is for something you've made that other people can play with. HN users can try it out, give you feedback, and ask questions in the thread.