kamiel79

Adding explicit thumbnails (featured images) to your content takes time. Even if you don’t add your own photography, you’d still need to go to search.creativecommons.org or so. This plugin hooks into the thumbnail URL and changes this with an image from the Flickr API, based on the tags in your post. If Flickr couldn’t find anything, it will return an empty string. I have achieved good results, with posts that all of a sudden had a rather adequate thumbnail.
[Flickr images might have licensing issues, so I recommend to use this plugin only on personal sites]

Flickr Fallback Thumbnail

Automatically grab a fallback featured image if your post doesn't have one!

Square One Media

Richard Webster

This WooCommerce plugin prevents a user from being able to purchase a downloadable product that they already own, as long as they are eligable to download that product. In place of the “Add to Basket” button on the product page, a message will display informing the user they already own the item, and links to download the linked files are provided there. Those links are the special links to the file that are provided on the “My Downloads” page, or part of the “My Account” page.
If the user has had a refund for the item, or if they have used up all of their allowed download (when product has a limited number of downloads) then the normal “Add to Basket” button will show again, allowing purchase.
On any page that displays the products other than the single product page, the button shows as “Read More”, as though the product is not available.

Disable Downloadable Repeat Purchase – WooCommerce

For WooCommerce. Disable the ability for logged in users to purchase items they already own that are downloadable.

Flickr Fallback Thumbnail vs Disable Downloadable Repeat Purchase – WooCommerce