The Congo centre-half was recruited into the Hoops battle for Premier League survival after they triggered a release clause to push through a £12.5million transfer, with a contract which is reported to be worth around £100,000-a-week.
QPR manager Harry Redknapp described Samba as a "monster" and is in no doubt it will be money well spent should the west London club fight a successful battle against relegation, although his side remain seven points adrift of safety following a 4-1 defeat at Swansea.
Anzhi director German Tkachenko, however, revealed no-one there could quite believe what QPR were willing to pay to get their man.
Speaking to Russian news site www.sports.ru, Tkachenko said: "At QPR he will earn almost as much as he did at Anzhi. In my view QPR have lost their minds.
"When they agreed to pay his release fee we wept. He (Samba) wept.
"Everybody says that he ran away from the club, but that's not true. He didn't put any pressure on the club until we received an offer from QPR for £12.5million, the amount required by his contract."
Tkachenko revealed former Blackburn defender Samba was keen to return to western Europe for family reasons.
"It was linked to the threat that he would lose contact with his children," Tkachenko added.
"That was a big blow. He was a guy who loved all of us. And besides, he is a very good defender. I think he is one of the top five defenders currently playing in Europe."