Agora theme uses Rainlab Blog Plugin for blog capabilities. It is a full featured blog and you can take a look at the demo.
Shopaholic recently added "Promo" feature. It is a feature for Offers and promotions.
I don't know if there are any plans for STRIPE support from shopaholic.
Agora is a Multipurpose theme with e-commerce and blog support. It also has an easy and fast way to build your pages. For the e-commerce part is using shopaholic free plugin. You can read shopaholic docs to see all features of this e-commerce system. There are also many paid shopaholic plugins if you need some extra features.