Popify Questions

First of all, I wanted to indicate that the product seems consistent, but I have some doubts, I would appreciate it if you could tell me if my comments are wrong
1. I don't quite understand the prices indicated on the appsumo page, on their website, the maximum is
15 dollars a month 50 campaigns, (147 Dollars) in appsumo 50 campaigns worth 3360 dollars.
https://app.popify.site/plan.

2. They indicate that they are the owners of the platform, but not the developers, I think they are a group of 8 people, and that they will make updates from time to time, that means that they can spend a year without updates and there is no plan product development, especially when they bought the platform and not even the old developers are involved.
3. On their video tutorial platform there are 2 or 3 videos, and they indicate that they are enough and that if required they will make some more, logically if they are not going to make updates and they are going to keep the product as it is, it is almost 500 dollars of investment, it does not seem very appetizing.
4. The roadmap will be updated, or everything will remain static as it is.
I'm sorry if I could have bothered you, it just seemed like an interesting platform, but many doubts have arisen, thank you very much

2 - Can I use CSS Class to insert pop-up on my website to a CTA button?

3 - Do you have a wordpress plugin?

4 - anywhere to find existing templates to see options prior to purchase.

Thank you kindly sir

Can I not change the colors on a button bar?

Because to me, I see this is exactly the same as
https://codecanyon.net/item/social-proof-skyrocket-conversions-growth/24033812

Correct me If I am wrong. 👋😂

Thank you.