Looks like this is a thread for collectors but I noticed that nobody has commented on the durability in play of these figs... here is my experince.
My 3 yr old has been playing with variety of the brands of bootleg figs for about 6 months now, I know they are recommended for older kids but he loves them so much I can't deny him :) as you can expect he is fairly rough with them.
SY- good all round, printing is lasting well. Only issue are the arms which can get loose over time
DeCool- OK but the faces seem to rub off very quickly especially if the have a mask. Also the hip design means the legs occasionally drop off
Lele & bela- not as good general plastic quality more brittle but I think the printing has not rubbed off as much as decool.
All in all the none are as hard wearing as lego (my 3yr old is obsessed by dismantling and rebuilding them constantly) but if you want them for a durable play toy SY is the best option in my opinion.
Also Aliexpress has been a revelation! I still don't understand how they manage to keep the cost so low.
Annoyingly the only bad experience has been on a recent order for a gold and green ninjago figure set that never turned up. They were intended to be for my sons birthday, and its sods law literally the only thing he had specifically requested. He took the let down like a boss!. I just have to wait till my dispute goes through to re order