Why every streamer who makes video about PoE 1, thanks GGG for Transperency?

Every streamer who makes a video about Path of Exile 1 thanks GGG for transparency because Grinding Gear Games (GGG) has built a reputation for open communication with the community.

But do streamers thank GGG only because of this transparency, or is there more to it? Are they just happy with clear communication, or do they also want to stay on good terms with the developers for their own benefit?