Regarding Regular License to buy themes.

I am new to WordPress and want to build affiliate website using Rehub and Content Egg.
But I not clear enough on License term. Can anyone help me if these themes are one-time payments or yearly? And will I get free future updates?

Rehub :
Content Egg :

I am not sure if this is correct place to ask such question, if not please suggest.

One time, and yes lifetime of free updates as long as the author maintains the item for sale on envato

Thanks for the reply!
Do this themes also allow us to make miner changes like a custom page or different color combination?

Yes that fine - you can edit as required