DS is Domain Space
MCS, MCP, and DCP in the same DS boat.
This and the other store are posters for Shopify integraton and development of bespoke apps.
The prices are for crowd funding development if you wish to support me in same. I only use Shopify as a developer. Clients will incur Shopify charges for the Shopify features included in their projects and will need their own Shopify accounts.