## Bug description

This is what a default feature flag looks like:
<img width="577" alt="empty feature flag" src="https://user-images.githubusercontent.com/4550621/113333154-63f36a00-9322-11eb-8fb0-71b0cd865181.png">
It has no rollout percentage specified, nor filters, so it says "Rolling out to 100% of users". However I've experienced that in fact in this situation the flag is rolled out to *nobody*.

CC @paolodamico 

## Expected behavior

Flag should work the way it says.

## How to reproduce

1. Create a feature flag and leave it as is, supposedly completely rolled out.
2. Try to use it.
3. Discover that the flag is not rolled out.

## Environment

- [x] PostHog Cloud
- [x] self-hosted PostHog, version/commit: master (8f4ae2b)

#### *Thank you* for your bug report – we love squashing them!

posthog/api/test/test_decide.py
self.team.app_urls = ["https://example.com"]
        self.team.session_recording_opt_in = True
        self.team.save()
        response = self._post_decide(origin="evil.site.com").json()
        self.assertEqual(response["sessionRecording"], False)
        response = self._post_decide(origin="https://example.com").json()
        self.assertEqual(response["sessionRecording"], {"endpoint": "/s/"})
    def test_feature_flags(self):
        self.team.app_urls = ["https://example.com"]
        self.team.save()
        self.client.logout()
        Person.objects.create(team=self.team, distinct_ids=["example_id"])
        FeatureFlag.objects.create(
            team=self.team, rollout_percentage=50, name="Beta feature", key="beta-feature", created_by=self.user,
        )
        
        FeatureFlag.objects.create(
            team=self.team,
            filters={"properties": [{"key": "email", "value": "tim@posthog.com", "type": "person"}]},
            rollout_percentage=50,
            name="Filter by property",
            key="filer-by-property",
            created_by=self.user,
        )
        FeatureFlag.objects.create(
            team=self.team,
            filters={"properties": [{"key": "email", "value": "tim@posthog.com", "type": "person"}]},
            rollout_percentage=50,
            name="Filter by property 2",
            key="filer-by-property-2",