Do beware of SMM panel traffic as they promise you the most. They all say "real human traffic" while it's incentivized, low-quality or mix traffic. I would assess the quality of traffic not solely through the title of the panel but rather based on engagement metrics vis-a-vis a duration of session, bounce rate, pages per session and conversion behavior. For $3 per 1000 usa visits, I would be asking how real is your traffic. Most likely it just will be not a real visitor from that price point. If your goal is SEO or revenue, a smaller amount of highly targeted traffic is usually more valuable than a large volume of cheap visits.
@sam12344