Need help regarding growing NSFW subreddits.

I'm new to the adult industry, but I've been setting up for starting a business. Still haven't decided exactly what, but I've already claimed a good domain and all socials.

Now, I have a few questions about growing my NSFW subreddit. I found a pretty nice niche and sub name and there aren't other subs similar to it, but it has quite a demand in the rest of the internet.

1) Where do you guys get your content from? Do y'all just go ahead and download the fuck out of porn websites? I saw someone here mentioned a site of old OF content or something like that, but I lost it.
2) Am I better off crossposting to subs with 4-8k users, or fully focusing on gaining karma to be able to post in bigger ones?
3) Are there any ways in which SMM Panel services could help me grow my sub?

Any other advice regarding this is greatly appreciated. Thank you!

Reddit updated its algo and it has become harder to crosspost.
Don't expect much these days coming from Reddit.