```ruby
class HomeController < ApplicationController
  def index
    @subscriber_count = User.count
    @story_count = Story.count
    @letter_count = Letter.count
  end
end
```

Use subscription instead of user for counts
user
```ruby
class HomeController < ApplicationController
  def index
    @subscriber_count = Subscription.count
    @story_count = Story.count
    @letter_count = Letter.count
  end
end
```
assistant