I've made 4 sockets with upgrades in my whole time playing.
Uni lvl 45 bracelet -> lvl 55 gave me one (TC)
Uni lvl 100 1 sock robe -> Elite gave me a second socket. (TC)
Normal lvl 10 ring upgrade with mets (I had half a bag of mets and nowhere to store, so spammed them, and got a socket after 3 tries).
Uni lvl 50 ring -> lvl 60 in market.
None of them were made after maint, but i made all 4 of them on a saturday/sunday. I dont see any coincidence, its just because i play more then.
I've tried all the myths, I think. Here's what ive been told.
-Upgrade just after maint (Sounds BS, people just spam mets durign that time, they are bound to get a socket eventually.
-Upgrade before maint
-Upgrade at 12:00 am servet time on the last day of each month - Time for second socket. (LOL?)
-Upgrade at the same time someone upgrades a 2 sock weapon and 'glitch' yourself a socket (0.o)
-Spam mets quickly (I macroed it with 4 clients, went through 160 mets in 2 mins and got nothing.)
-Upgrade when there are less sockets around/The chance of upgrading depends on the number of sockets on the server. (I figure thats BS, people make sockets on Dragon etc all the time, and they are loaded with sockets. I cant make one on Faith where not many have sockets.)
-Upgrade in market for second socket/TC for first socket.
I've spammed a few hundred mets on Faith and found nothing so far, so I figure spamming doesnt do the trick, its just down to luck when upgrading.
I still believe theres a 'trick' to socketing. When I played Freedom, 2 people (who shared thier accounts) made 2x 2sock earring, a 2 sock necky, sock boots, sock shield, sock atk ring. (Less than 3 weeks since server opened).