About email follow-ups: Does the system stop sending email follow-ups after 30 or 60 days days overall or will it keep sending it to new subscribers until their 30 days is over?

Every subscriber that joins your list will go through the followup sequence no matter when they join.

Its a concurrent 30/60+ days of followups for every subscriber at any level regardless when they join your list.

So in reality the 30+ days is just a number for demonstration purposes.

Hence; this does not mean if someone joins your list today they get 30 days of emails and if someone joins tomorrow they get 29 days of emails.

They all get all the followups regardless whether they are for 10,30, or 100 days. And the more followups you add (if you do) the more emails all subscribers would receive.

In the training under the section "Make More Money" Mike teaches how to add more follow-ups to your sequence.