These fighter are getting ripped off have a look at their career thats right career earning.
Reference
http://www.mma-manifesto.com/ufc-fighter-salary-database/salary-main/ufc-career-fighter-earnings.html
1 Chuck Liddell* $4,320,000
2 Tito Ortiz* $4,075,000
3 Georges St-Pierre * $3,572,000
4 Quinton Jackson* $3,490,000
5 Michael Bisping* $3,410,000
6 Randy Couture* $3,045,000
7 Rashad Evans* $2,997,000
8 Anderson Silva * $2,871,000
9 Brock Lesnar $2,825,000
10 B.J. Penn * $2,800,000
11 Antonio Rodrigo Nogueira * $2,640,000
12 Wanderlei Silva* $2,320,000
13 Lyoto Machida* $2,275,000
14 Vitor Belfort* $2,219,000
15 Mauricio Rua* $2,215,000
16 Matt Hughes* $2,045,000
17 Forrest Griffin* $1,907,000
18 Mirko Cro Cop* $1,885,000
19 Jon Jones* $1,852,000
20 Dan Henderson* $1,650,000
21 Junior dos Santos* $1,590,000
22 Frank Mir * $1,433,000
23 Josh Koscheck * $1,380,000
24 Rich Franklin* $1,326,000
25 Diego Sanchez* $1,283,000
26 Nate Diaz* $1,189,000
27 Cheick Kongo* $1,183,000
28 Jon Fitch * $1,134,000
29 Cain Velasquez * $1,118,000
30 Frankie Edgar * $1,116,000