Hello Max,
Thanks for your queries. here are your answers in Bold.
1- with premium features, will your script have any link to you or is it full white label ?? to be more clear if i'm a developer will my customer know that I used your script at anyhow ?? Yes, you can remove all branding of sellacious and replace it with yours. However code variables and backend URLs contain sellacious, as the code is on your server, you can anyway reprogram it but that will make it nonupgradable to a newer version of sellacious.
2- Can we change every aspect of your script design ?? front-end /seller dashboard / back-end , and is it flexible ?? Yes. its based on MVC and thus editable, and as templates are part of views its always independent of business logic.
3- if we want more features or to expand using other Joomla extensions from other vendors , is that possible ? Yes, if their extension support sellacious
4- does it have affiliate system for multi vendors , so they can offer special discount code to give to their affiliates , so anyone use that code get a discount and the affiliate get bonus . Not yet, we can develop it for you on demand.
5- will i get the source code so i can add some features if i need to ?? Yes
6- do you have apps ?? Launching within weeks.