Firstly, is it not strange that on the whole those who use exclamation marks and other tricks to get their names at the top of the lists for gifts very rarely send anything back. This strikes me as rather selfish.
I have a gift policy as follows. Anyone who sends me gifts and shows up under Senders is put into the gold star column, and are sent the best (most valuable) gifts for at least a month.After a month they are demoted to bronze, and get the second best gift (of course, if they are still sending gifts they get promoted back to gold). After another month in bronze they go back to unmarked and get gold or envelopes, until they bother to send me a gift, and so on.
If time is short I may just send gold star gamers.
The ones that lose out are those where I have a lot of friends and the sender limit comes in, and I may not be still playing when the restriction comes off 20 minutes later.
I run five trainstation games under different email addresses, so those users who are friends get quite a lot of material!
By the way silver stars go to the other four of my games as well as gold stars
Do not be lazy - send gifts; they do add up. It is a tan second job