i just play with the same as in cs updaterate and cmdrate 101
doen't matter for me, sometimes i got literal 15 fps..
most of the times between 25-35
cl_disablefreezecam 1 or something is the best command i found
I had same problem, it wont work through the trade. But you can send in manuallly to 1 perosn on you're friend list.
Just go to Manage gift and guest pass and then find the CS:GO key and from there send the gift.