One of the main reasons that a lot of people get Keap Max Classic (formerly Infusionsoft) is because they want to build a membership site. Here are two great suggestions for membership sites that work really well with your system.
Memberium
Memberium lets you easily use all of the automated features available in Keap Max Classic (formerly Infusionsoft) to manage and control access to content on your WordPress site.
Easily turn any normal WordPress site into a full featured membership site that’s connected to Keap Max Classic (formerly Infusionsoft). Be able to take advantage of Keap Max Classic (formerly Infusionsoft) automation features in WordPress and start your own membership site.
AccessAlly
AccessAlly is a WordPress solution designed to sell, teach, and engage. It starts with high-conversion order forms, a built-in LMS, member directories, and gamification — that deeply integrate with your marketing automation system.
If you are thinking of a membership site, check them out!