Some people use many Bitcoin wallet specially those people who wants to earn a lot of bitcoin every week for signature campaign plus many accounts here in bitcointalk. As for me i only use 1 Bitcoin wallet , 1 is enough for me to received and send bitcoins.
it is very possible. bitcoin wallet reproduce address can also bring opportunities to earn more money. we are free to use it. it is a choice.
Yeah May be that is right but use so many bitcoin wallet will make them get higher fee cost. but If they do this becouse of security . It could be the best way,becouse everithing in the internet is could be hacked by some one who know about how this texhnology work.