Exactly, its a chain because you log on daily to continue it.

But i get the problem, what if you take a vacation but are not allowed internet on the trip?

I think to find a middle ground of keeping the sense of a chain & continue it while not being able to come only, how about making that "freeze chain" service cost something?

Like, lets say, you can freeze a chain for up to a week (you need to renew the service then) for the price of 500pc? (just an example)
It doesnt progress at all, you cant get money back from coming back earlier and it still helps keeping your chain going in the future when the service runs out.

The price of freezing should be significantly higher than what you get from the login chain bonus itself and to simply discourage freezing it for no reason.

Any suggestion/changes about this concept?