It’s a shame too! I used to be able to just tag in my local comic store to get stuff added to my pulls, when creators posted promos for their work. I can DM him, sure, but it’s now more steps because the creatives left Twitter.
We’ve returned to the olden days, when word-of-mouth was the only real way to advertise. As an author, if you enjoy a book, please: tell your friends. Your group chat, your sewing circle, your family WhatsApp, your work Slack, the voice channel of your MMORPG guild, anything.