Why did Youtube stop showing how many subs gained vs lost? what are they hidding?

Here you can see how in the past you said gained vs lost separately, so you would know exactly whats going on.

Now, if you gain 1000 subs but lose an abnormal amount like 900, youtube tells you you gained 100, but not how you lost 900, which would be useful to know because if you just know you gained 100 you may think the video didn't took off and you just got less views = less subs, but in reality it made you lost a ton which would give you a hint to not do that content again, etc. Basically missing information always goes against you.

up

May be just removed the feature because a lot of people do not use it.

Some times Youtube removes certain features and bring them back later. You can contact them directly on their Twitter page if you have an issue.