You can be a data vendor and begin to earn passively. You buy the data in cheaper price and add your own profit to it. Imagine selling a Data which is 2200 naira for 10GB from a site to someone at the rate of 2500 naira, how cool is that?
You can use any of this two sites to start Data business and earn. You can also buy the data for yourself and use. Remember it's at a cheaper rate.
Here are the sites :
https://www.data4me.ng//mobile/register/?referral=08155302454

https://roksub.com.ng/mobile/register/?referral=08155302454

You just need to click on the link, register with your name, Phone number and add a suitable password that you will easily remember.

You can also buy Airtime on the sites, subscribe for DsTv, Startime, Gotv etc.