The page where this report can be downloaded from Arcane's website was shared in a separate post, here on SN:

The State of Lightning Volume 2
#18678
https://arcane.no/research/reports/the-state-of-lightning-volume-2

One such development is the increased use of so-called value-for-value models
on the Lightning Network. In the value-for-value business model, content creators
leave it to the users to decide what value the content gives them and trust them to
compensate accordingly.

Stacker.News is an example of the value-for-value model put into life on the
Lightning Network. On Stacker.News users can share content and have the
possibility of being rewarded by other users for sharing this content. In the figure
below, you can see the development in unique visitors to Stacker.News and the
amount of satoshis spent on tipping others for sharing content. The numbers are
still relatively small but rising quickly.