Reporting susbscriber counts doesn't paint a good picture of how well the business is doing anyore.
You can have a subscriber that's paying on average $5 USD a month in the most popualted country in the world India bringing down your revenue per user. You can have their growth there causing a net positive growth in subscribers while your loss is happening in a region where peopel are on average paying $15 USD a month. You lose 1M subscribers in America and gain 2.5M subscribers in India leading to net of 1.5M subscribers. That looks positive but you are making less money.
People used to be impressed by how many subscribers Disney had worldwide. When you break it down most of them were subscribers who weren't paying a lot of money which is partly why they were losing so much money compared to their compeitors who have far less subscribers.
This has always been an issue with the metric but the decrease in improtance is exasberated by having such high market penetation, the introduction of ads and introduction of paid sharing (people can pay extra for sub-accounts that don't count as full members). If you have millions of ad supported users and you see increase engagement, that can lead to higher revenue. When you invest in improving the business, i.e. making better bets or investing in efficiency that leads also to more profits. When you increase prices and see minimal churn, that leads to more profits. Sub growth is increasingly more of a distraction.
Netflix said they will still share subscribers numbers, just not every 3 months with predictions on what that number will grow to every 3 months.
In regards to stock price, people will react however they want to react. It doesn't mean they know what will happen in the future or indicative of what all the investors thing. So far the general sentiment with major investor and analysts is still postive.