How to get paid for connecting people?

Could you elaborate on the various ways one can potentially get paid for connecting people? Is it primarily through referral fees, commissions, or does it involve other forms of compensation as well? How does one establish credibility and trust in order to successfully facilitate connections that lead to financial rewards? Additionally, are there any industries or niches where this approach is particularly lucrative, or are the opportunities widespread across various sectors? Lastly, what strategies can be employed to maximize the chances of earning income through this type of endeavor?