Please excuse me if i am restarting a discussion already done on wr bt my question is slightly different

Firstly about the above scripts
recomendit - free gives a plam pc free
let em know - free no free gift
bravenet - free no free gifts

Please inform do these services insert any kind of advertisements in the emails sent

Secondly how important is it to give a free gift to get more recommendation email.

I guess a gift is always an added benifit & can dramatically improve the responses obviousley if the site is of quaity.

Any other techniques to get the maximum out of this recommendation technique.