It's sad news.
Qualiteam says great thanks to Bill, one of the long-term community members and module creators, for all the years supported X-Cart and our customers. However, since Bill decided to move with his own shopping cart solution and started advertising it to X-Cart customers, we have to close the access X-Cart forums to Bill.
What I can do is to explain that moving from X-Cart - the result of 15 years of efforts of 100+ people and we still have things to improve - to a self-made shopping cart based on a self-made framework is not a good idea at any glance. I don't see how one man has time to develop and support the entire platform.
Since X-Cart 5 release, we prefer that our partners adapt their modules themselves, instead re-implementing it on our side. That's why there is still no alternatives for AlteredCart addons. Now it's a great chance for the community to take Bill's share of the pie.
PS: I will attend X-Cart Orlando Meetup at Jun 2nd and will announce some new superior features and share the roadmap for both X-Cart 4 and X-Cart 5. The registration is free, and there's still a couple of seats left. Register here:
https://www.eventbrite.com/e/x-cart-meetup-registration-24017101798