present_p from ec_products is defined as:
boolean | default ('t')
When adding products one by one[1], present_p defaults to 't' (at least because of radio button settings within the add-product form[1]) as the user expects.
With bulk uploading products (/admin/products/upload), my experience is that present_p values remain null so that none of the uploaded products are shown in the shopping basket. =(
I do not include present_p in the products data uploaded.
Is this standard/expected behavior?