I create Wikipedia pages for clients on popular freelance websites and have been quite successful with nearly 100 5-star feedback reviews as well as an overall 5 star rating... however, these freelance websites charge me 10-20% of the revenue depending on each site. Although I have started a basic pricing page on my own website, I'm not sure how to take it to market as this is a very specific niche - simply using Google or Facebook ads will not be that useful. Companies, individuals, products or topics eligible for Wikipedia are the ones with some kind of news coverage or references from published books, magazines etc. Any advice, on a general approach or marketing strategy (ads targeting etc?) and marketing venues that can be used would be appreciated.
I'd first ask if you are getting decent deal flow through the freelancing sites, if it would cost more than 10-20% margin to acquire users on your own, including the price of handling payments, invoicing, etc. Just something to consider, independence is great of course.
If you'd like to supplement those projects instead of replace, that seems like an easier transition to expand your overall clients and deal flow.
Paid acquisition would be a tough route and sharp learning curve. If you were to go that way, the best funnel would probably be to paid > content piece > email drip or phone consult
If it were me, I'd do cold email by prospecting via linkedin and emailing qualified leads directly using permutations on their name to the domain of the current company.
Don't try and sell them in the email, just to show them something cool that you do they might find of interest - or a tip on something they could be doing and might not be. Personalization is the key on these emails and a clearly defined objective for sending them (click link, respond, schedule call, etc)
Hope that helps a little :)