I'll make this review short and sweet!

What I like about Fatcat plugins:
* very simple and easy to implement (all plugins)
* I like OptinCat! They have a ton of features aside from this popup demo here: https://design.mrdzyn.com/
* Pricing plugin has a lot of design options aside from this demo here: https://design.mrdzyn.com/services/
* Landing page is really easy to configure: https://design.mrdzyn.com/subscribe/
* Quiz: https://design.mrdzyn.com/quiz/

Things to improve on:
* Need more integrations with Appsumo launched tools like my favorite Sendfox and Kingsumo!
* More templates / design customizations
* Integration with Unsplash for the Background (landing page)

Hope you guys give them a try!

Cheers,

Mike
Mrdzyn Studio