Haha yeah Omegle is a bit hit or miss. There's a bunch of people only looking for sub4sub - ignore these people!
There's a bunch of people who leave a link then disconnect - ignore these people!
There's a bunch of horny creepy guys - definitely ignore these people!
I hardly use Omegle because personally I've found it brings in more trolls than people who mean well. But when I do, I put 'YouTube' in the interests section, as well as subjects that are relevant to my videos. For example, if I wanted to promote my latest video (a review of Monsters University), then I would put YouTube in the interests, as well as, say "monsters University", "Monsters Inc", or "Pixar".
Usually when you do that, you cut out a large portion of the aforementioned people to ignore and if you have a long enough conversation about the subject, you can casually slip in the old "hey, you should check out my video", and even if they don't sub or like or comment, 99% of the time they'll at least watch it.
Tbh I'm tempted to just walk about screaming "LOOK AT MY CHANNEL, LOOK AT IT!".