Well French Tickling still updates, just not here anymore from what I know. And Tommy is no longer running Tickle Abuse, but the store still updates.
Lately obviously the big thing is COVID. And looking at some of the trends, I won't be shocked if we see the industry take another hit.
Also a big thing is piracy. C4S takes a decent cut from the creators on their site, and piracy isn't exactly slowing down. Even with pornhub no longer being an option, people will find ways to share and download pirated content regardless.