Anthony Gonzalez, Wes Welker, Austin Collie, Kevin Walter etc....
It depends on the receiver. All players in the NFL, including wide receivers, are paid differently.
White stripes are "easy" to see and follow by receivers. This is the reason why PRO´s do not use them...
There must be a minimum of four receivers, but most teams get five because of the dime formation, which has five receivers.