How would one go about utilizing online methods to gain new cuddlers?
I'm taking it that one would be looking for a new cuddy buddy for oneself.
On this site, search for people you would be interested in cuddling. If they are professional, contact them with the intention that you will pay them for their time. If they are non-professional, strike up a conversation and chat a bit. Of course, be respectful and don't complain that people don't respond to messages, that is a common occurrence for all social media platforms.
On other sites, send a message with a statement that you are looking for a platonic relationship that extends to cuddling. However, unlike this site, the person you are messaging may not be open to cuddling, so have the expectation that they would deny your request.
I suggest you read the FAQ (Frequently Asked Questions): https://www.cuddlecomfort.com/forum/discussion/4232/frequently-asked-questions
GAIN new cuddlers? Like a Pokemon master?
Are you a pro looking to gain clients or just a regular fella looking for cuddling prospects?