Shopacado ‑ Volume Discounts

I'm updating my review... Original review: Among the easiest apps to setup, great features, and great customer service. And fair pricing. Their team helped with our theme integration within 5 minutes of us installing the app. Much appreciated, highly recommend! IMPORTANT UPDATE:
Your store customers are, by default, not subscribed to your email list unless they opt-in. There is no way to change the setting to opt-out while this app is installed. During our use of the app, our subscribe rate post-purchase went from ~75% to 5-10%. Email is our number #1 channel for retention/repeat orders, so we had to remove the app and go elsewhere. I honestly don't know how many stars is fair, as the app and customer service are great. But email lists are so critical to revenue that anything interfering with subscribe rates is a big, big problem.

I used this app for a few days campaign but deleted afterwards due to order errors and lack of customer service.
About 17% of orders received during the campaign did not get applied the volume dicounted pricing so I had to manually refund every customer their discount. I reached out to customer service who did not make a big deal to fix this.
The app also changed prices by changing the currency of the sales price from time to time.

The developer needs to fix those issued I had and then this would be a great app.

The application worked fine but it deleted the information of other apps (customized) that caused errors on my orders. I hope the developer can fix it

I really liked this app, I was setting it up and realized after an hour of setting up the design and everything that it stopped my current automated discounts which I had running. And during that hour we had no orders because the sale we were originally running stopped working from this app, so BEWARE! Even if you don't press "enable offer" and you set up the code in order to see the test previews, it would stop any current shopify offer you already have. I was really hoping to transition to this. I tried to also download it again after deleting but I didn't do anything except "accept" the app permissions and then it did the same thing again. Very sad, because I was actually liking what was being built on there. I just can't afford to stop our current sale to configure this app, as we would lose lots of costs from landing traffic.

Cuando estoy en el carrito de compra y modifico la cantidad, la aplicación no efectúa el descuento, saben por qué?