Yes, I know, you’ve heard 1,000 times before about telling everyone that you have the best SMM panel on your social networks. By all means do that, but there are other ways to use social media.
You’re promoting social media, so where do you look for clients if not on those social networks? See a small channel that’s trying to grow, but needs a boost? A great chance to write to him and offer your services! A streamer on Twitch can’t get a large audience? This is your client, look for his contacts directly on the platform! Found a Facebook group discussing promotion or (even better) looking for the best SMM panel services? This is your chance!
However, do everything within reason. If YouTube and Twitch do not mind too much, if you contact the owners of the channels, then on Facebook you should not spam your offers of services or place a link to your panel directly on the main page. It’s very easy to get banned that way.