Yeah it's confusing alright. I go to FT for an rda, and PP isn't an option, so I go to ebay, and no problem.
I haven't had or read about problems using PP for Hardware on FT. Do you recall which rda it was that you Couldn't use PP on?
BTW - As a Test I added this to my Cart and did the Check Out to see if PP was an Option.
$4.76 Dekang E-liquid for Electronic Cigarettes (50ml) - Watermelon flavor / high nicotine at FastTech - Worldwide Free Shipping
The PP option was available. But the pay via a Credit Card was gone.