Hi there, everyone!
I am not an active member right now in SVS. I also barely write here, and I only joined SVS for three months after I had won the contest year ago (If I am not wrong) and also bought a class from here. But, I learned A LOT from people here in SVS as I read the threads and discussions. Long story short, I think I should also give some contribution in exchange.
Although I am not a hight profile illustrator, I've been working as a full-time illustrator since 2016. I've got projects mostly from Behance. I used to work for primarily self-published authors and companies in the past years.
Last December, after so many rejections and silent emails from agencies, I've finally signed with Cat Agency. They've rejected my first approach, but they gave me critical feedback. It required me like more than one year to eventually changed my style a little bit and signed with them. After all, it was worth it to tweak my portfolio until I feel comfortable and confident with my works before I've signed with an agent. (So if an agent is now rejecting you, but you have solid feeling and connection to that agent, don't give up yet. There might be second chance).
I am not an expert in this field and agents stuff, but as I've mentioned, I learned a lot from this forum, so I thought this would be a little bit of information to share, and if you've any questions related, don't hesitate to let me know!