A Manchester United fan group stepped up their anti-Glazer campaign ahead of the Barclays Premier League match against Portsmouth.
The Manchester United Supporters Trust want a change of ownership as well as forming a significant group for potential financial involvement in any fans' Red Knight bid.
The group distributed 70,000 cards to those attending Saturday's game.
Their recruiting drive comes on the 52nd anniversary of the Munich Air Disaster in which 23 people died, including eight players.
It is also five years to the day the Glazers first tabled a bid to buy the club.
A MUST spokesman said: "This day in our history is a permanent reminder that Manchester United Football Club is far more than a business.
"Manchester United is a family with a history and a tradition like no other in the world. The damage they (the Glazers) are doing must be stopped."
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