Legal options would be opt-in methods like popups on your site, “text-to-join” promos, or Facebook lead ads. By buying sketchy lists or scraping numbers you get yourself slapped with some hefty fines. Use solid platforms like Klaviyo, SimpleTexting, or Attentive to gather and manage numbers the right way. If you’re juggling multiple lead gen accounts,antidetect browsers and mobile proxies will help keep your sessions tidy and unlinked. And also always give people a way to opt out, and only hit 'em up during legal hours (8 AM-9 PM).