After any parameter change, you need to delete your cookies, as the values are directly tied to your user.

Couple of informations about the demo usage:

1. The countdown is tied to your `llt-cookie`. In order to reset it, remove your cookies.

2. You can manipulate countdown via `?countdown=` query param(requires cookie reset)

3. You can apply custom offers via `?custom_offer` query param. The valid values are 1234, 5678 and 5374. Applying those values, adds a custom % off, and modifies the link of the button.

4. You can change the campaign via `?campaign` query param. The only valid value is `spring`. Or you can just simply omit it, to get the default campaign.

5. You can override the country and browser you're using by specifying `?browser_override` and `?country_override` params. This is for easier usage of personalization defined in backstage.

6. After the initial countdown passes, the "extra" countdown will start. For the needs of this demo, the chance to get the extra countdown is 100%, but this could be easily handled via an A/B test and is fully opt-in.

7. The extra countdown has an A/B attached to it. By default, it will take 30 minutes. But if you use `?forced_experiment=extra-5-min` query parameter, you will get rolled into an A/B test where you get only 5 minutes.