I think the signature conditions are a bit harsh...if you do not make 10 posts in a given week you will lose all your stakes. For that week everyone would agree but for the entire campaign!
You have read the rules a little wrong.
If you do not make 10 messages a week - you do not get a one-week bet. You can skip a week, you can not dial 10 messages a week, it does not matter. The glasses you earned before do not burn.
The rules say that in order to get something, you must leave at least 10 messages a week before the end of the campaign.