The usual is to go with Instagram and TikTok creating low effort content stuff like #fakebody #spierdmanvideo, spam shitposts on Twitter attaching model photos. Then re-upload all this on top-funnel sites like Reddit, Imgur, Pinterest, Redgifs, it can generate up 1,000,000 daily impressions, but attaching the links is quite tricky, so make sure to watermark the content, so the interested audience can find the model on its own. One of the best method right now is also using YouTube as one of the main channels, stuff like stretching or clothes tryout video are getting weirdly popular, and they rarely get banned, if your model actually knows something cool you can also create general channel around it, but keep in mind that they will need a lot of help and guidance, as making long form videos and YouTube growing is most likely beyond their scope. As agency if you develop pipeline around all this you should be able to scale it quite nicely, handling any amount of models there is