Even though you seem to want it for the right reasons, gifting or tradable shop items would certainly lead to sanctioned/legit gil buying. In both Rift and SWTOR if you need in-game currency the easiest thing to do is buy some cash shop items then sell them in-game. Some people even advertise like"I'll buy whatever you want, and for every dollar I spend you pay me x amount of gold." This would certainly cross the pay to win line.