Similar on IG, which is why a lot of the photographers on my feed will post five or six images, "Which is your favorite, 1-6? Comment below!" because they get the engagement, synthetic or otherwise, of you clicking through each image, and then commenting.
Youtubers also adopted this trick. The best pattern currently is to voice a random question in the middle of the video or present themselves as "I'm not sure about this, please correct me in the comments" as transparent plan to entice people to comment. I even bought it a first few dozen times, but now when every single creator does it, it is kinda tiring.
I am curious to see this pattern in action. Can you share some @-usernames for these photographers?