5k per month for f2p ? are kidding me? lol

for exemple : u have convoy (best method of coupons for F2P) 40+50+10 one hour log = 100x30 = 3k and if u have luck with wheel group u can get 1k pzr month and 2 times of summons and if you are lucky u can get 40coupons thats mean 80 per day so its 80+80=160*4=640

result is 3k + 1k + 640 = 4k6 if you have luck all month :)

so f2p needs 3months for Minato J to make 13k coupons saved

Do you get a SS license when you successfully plunder?

You forget the tree in home,lvl1 3cps=90 month,lvl 2 5cps=150,lvl 3 7cps=210,lvl 4 9cps=270,lvl 5 11cps=330,lvl 6 13cps=390,lvl 7 15cps=450,lvl 8 17cps=510,lvl 9 19cps=570,lvl 10 21cps=630,lvl 11 23cps=690 and lvl 12 25cps=750.

Lets say if your server is not dead that 130 from convoy/plunder may easily be 50 for a f2p, but as you pointed out is still possible even by getting 1500 instead of 3900 to hit the 4.5k mark.

That said getting the 4 cave keys from the wishing tree is generally a better choice (120 free keys = 24000 moon scrolls saved up for other items).

about the convoys you are right, is very possible to get them delivered safely, overall in old servers (in new ones there's no way), but for plunderings you can never know if the enemy is supported by somebody that may disintegrate you on auto unless you selfplunder your alt, but doing so is against the rules and you may be banned...