DVDFab has launched a user-requested promotion for existing customers to upgrade miscellaneous modules they may currently have with lifetime licenses to the All-In-One package. The discount from the current All-In-One package price varies depending on which modules you currently have, but the website has an automatic calculator so there is no math required! Your price is shown before any credit card info needs to be entered and includes the standard 20% discount in addition to the module credits.
You should have received an email about it if you are eligible, but you must be signed up at the Member Center on the website to take advantage of it.
Note that the credit for currently owned modules is based on their full current retail price, no matter when you bought them or what you paid, so if you bought them long ago when cheaper or with a discount code you are actually getting ANOTHER discount, a big one in some cases. This expires in 10 days.
If you think you should be eligible but did not get the email, send a message to mona(at)DVDFab.cn