Well, I just saw another ad a few days ago which reminded me I should probably check this site out more and get off 4chan for obvious reasons, its only redeeming quality is the same as any other mainstream site, the large userbase, if you're in a hurry you can get some quick replies, the quality however may leave much to be desired.
The timer is pretty badly done, I've had to do it today for the first time twice in a row despite having cookies, same IP whatever, it won't help with actual spam anyways since any committed spammer can wait and/or exploit the email or pass bypass. Why not just force everyone to wait if thats supposed to be an effective deterrent? I must question if they actually don't keep the emails, they are aware that any Outlook/Yahoo/Gmail can make infinite aliases right, restricting the domains once again would just punish legitimate posters and not spammers who have dozens of legitimate verified accounts that they can make unlimited number of addresses with each.
I also saw threads being moved from /g/ to /b/ for being off topic then the /b/ mods purging them for being off topic...
4chans problem is the same as any other big sites, its way too popular for its own good, there are too many bad actors looking to exploit it combine that with incompetent misguided administration and this is what you get.
To answer the original post, considering there was a time when reddit had gore on the front page and now aside a few more specific smaller subs that haven't left/weren't banned yet most of it is an exact copy of facebook and tiktok tier content, its possible with time, except that even if they can get enough users to stick around there is no way they could ever actually succeed, I can not imagine any big companies buying ads on there or an official client being allowed up on the mobile stores, reddit changed soon enough to survive, 4chan will just go down when it becomes more trouble to run than its worth.