Yes, with Network Marketing or MLM, you will earn from everybody’s effort down the line into an infinite extent. This means that your outcome, being alone, as a single human being, who has a limited capability within the 24 hours period (the only time avialable to all of us), will not be confined within the limit of your own limitations, but by the potentials of unlimited extent of people, whom you no longer know and care about, who are all doing their stuff everyday for their own benefit.
Multi-level marketing is a strategy some direct-sales companies use to encourage their existing distributors to recruit new distributors by paying the existing distributors a percentage of their recruits' sales. The recruits are the distributor's "downline." All distributors also make money through direct sales of products to customers. Amway is an example of a well-known direct-sales company that uses multi-level marketing.
Just because you paid for the lead, it doesn’t mean that you should get emotionally attached to each one. Buying leads is, and always will be, a sorting process to find your next business partners. If you are terrible at the phone, either, buy MLM leads or get a job at a telemarketing company. Gaining experience on the phone is worth its weight in gold. Every big recruiter or enroller is good on the phone. Most of them used to be terrible but experience made them better.