EDIT: Found this in its code, looks suspicious.
Found SteamID check
@ Line: 71 in "pointshop2/lua/ps2/client/tabs/management_tab/cl_dpointshopmanagementtab_exportimport.lua"
Code:
"STEAM_0:0:39587206
Found SteamID check
@ Line: 70 in "pointshop2/lua/ps2/client/tabs/management_tab/cl_dpointshopmanagementtab_exportimport.lua"
Code:
"STEAM_0:0:19299911",