1st Month - 1 member in downline (earning $1.50)
2nd Month - 3 members in downline (1 recruited by yourself and 1 by your downline - earning $4.50)
3rd Month - 7 members in downline (1 recruited by yourself and 3 by your downline - earning $5.36)
4th Month - 15 members in downline (earning $6.70)
5th Month - 31 members in downline (earning $8.92)
6th Month - 63 members in downline (earning $12.52)
7th Month - 127 members in downline (earning $19.32)
8th Month - 255 members in downline (earning $32.52)
9th Month - 511 members in downline (earning $58.52)
10th Month - 1023 members in downline (earning $110.12)
11th Month - 2047 members in downline (earning $212.92)
12th Month - 4095 members in downline (earning $418.12)

You would have made an average of $34.50 a month. This is not a lot of money but consider that one person a month recruited is also a very low effort. Let's see how it goes in our second year with this example..

13th Month - 8191 members in downline (earning $828.12)
14th Month - 16383 members in downline (earning $1,647.72)
15th Month - 32767 members in downline (earning $3,286.52)
16th Month - 65535 members in downline (earning $6,563.72)
17th Month - 131071 members in downline (earning $13,117.72)
18th Month - 262143 members in downline (earning $26,225.32)
19th Month - 524287 members in downline (earning $52,440.12)
20th Month - 1048575 members in downline (earning $115,355.06)
21th Month - 2097151 members in downline (earning $241,184.56)
22nd Month - 4194303 members in downline (earning $492,843.18)
23rd Month - 8388607 members in downline (earning $996,160.04)
24th Month - 16777215 members in downline (earning $2,002,793.38)

Much better eh?
$166,899.44 on average each month. Of course, this is only an example to show how people and earning accumulate with the minimal effort from your side. It is not a promise or guarantee of earning.