Dear Jörg,
As you can read, the DELUXE subscription's description reads exactly:
The all-in-one deal! Unlimited sites / domains license.
Get one year access to downloads and support for all of our components for the Joomla!™ CMS*.
* Excluding Akeeba Subscriptions. Support for this product has been terminated. WordPress and standalone products are not included.
Akeeba Solo and Akeeba Backup for WordPress are not components for the Joomla! CMS. They are, respectively, a standalone PHP application and a WordPress plugin. Including them to the bundle would add another 60 Euros, taking its price to 150 Euros. That's a steep price increase which infuriates people, as we found out when we had added Akeeba Subscriptions to the Deluxe bundle two years ago.
To that end, we made the purchase of Akeeba Solo and Akeeba Backup optional. However, if you are already a DELUXE subscriber you buy them with a big discount, 36 and 24 Euros each. That's the same 60 Euros you'd be paying should the Deluxe bundle include them right from the start. We believe that letting you purchase this software separately, only if you need it and for the same price they would add to the Deluxe bundle should they be included, is the most fair way for all of our clients.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!