Profoundnet is the Profound Bond tumblr, found here, where member posts and creations are reblogged and PB fests/projects are promoted. The blog only follows those in the Profound Bond network. To be added to that network you need to be part of the discord and submit an ask to the tumblr blog. Once you are part of the network, you can use #profoundnet in the first five tags on any of your destiel/gen SPN creation posts, and the post will be reblogged by the Profoundnet tumblr.
Should you not be a part of the network or what you've posted is not destiel/gen, you can still use the tag. However, your post will not be reblogged. Meaning you can use it to get more potential views, but we will not be promoting it unless the qualifications are all met.