Expire date on indefine subscription plan

Hi guys!

I noticed that every member, on every subscription have a "Level Expires" date defined.

How does it work on Subscription plan which have the mode: Indefinite ("User remains on this level for ever") ?

I saw it calculates a Expire date for users independently of the mode of the subscription plan.

What happens when that date arrive (on subscription plans with Indefinite mode)? Will the users be unsubscribed? Will their log-in be blocked? Nothing will happen (and I can just ignore the "Level expires" date.

Thanks in advance!