An Eastern Jackpot

Question

Normally I'm for 9

Exceptionally I'm for 13

To east, I am from heaven

To other directions, I am from earth

The brightest primary color

You either care about 1 and 9

Or entirely forget about numbers

Now wind blows from every direction

Better conceal them all, then another me

They blew 4 times? Then yet another me

But if you can't afford that, call the Bulgarian dragons!

Answer 1

I think this is referring to a

limit hand in many Mahjong styles, maybe more specifically the yakuman hands in Riichi?

namely

Normally I'm for 9

Nine Gates, a "normal" hand in shape

Exceptionally I'm for 13

Thirteen Orphans; an irregular or exceptional hand

To east, I am from heaven

the Heavenly Hand

To other directions, I am from earth

and the Earthly Hand

The brightest primary color

All Green

You either care about 1 and 9

All Terminals

Or entirely forget about numbers

All Honors

Now wind blows from every direction

(Big/Small) Four Winds

Better conceal them all, then another me

Four Concealed Triplets

They blew 4 times? Then yet another me

I can't place this one other than being another Four Winds - Four Quads, maybe?

But if you can't afford that, call the Bulgarian dragons!

Three Big Dragons

Answer 2

Are you

Points in Mahjong (Hong Kong rules)?

Normally I'm for 9

Commonly you score points for three sets of three (e.g., if the sets are all from the same suit).

Exceptionally I'm for 13

Sometimes you get points for special hands of 13 (e.g., "Thirteen Orphans"/"Thirteen Wonders")

To east, I am from heaven

The East player gets extra points from a "Heavenly Hand" (winning with the initial hand)

To other directions, I am from earth

Players in other directions get extra points from an "Earthly Hand" (winning right when East discards their first tile)

The brightest primary color

Not sure about this one, I suppose you get a point for having a set of red dragons.

You either care about 1 and 9

A hand with only 1's and 9's ("Orphans") gives you extra points.

Or entirely forget about numbers

A hand with no numbered tiles (all honor tiles) gives you extra points.

Now wind blows from every direction

Mahjong has wind tiles for North/East/West/South, and you get a point for having a set of wind tiles (either for the prevailing wind or your own wind).

Better conceal them all, then another me

You get extra points for having all your tiles concealed when you win.

They blew 4 times? Then yet another me

Could be either: (a) you can get an extra point if you draw the 4th tile for a set of winds you have or (b) you get extra points for having sets of all four winds.

But if you can't afford that, call the Bulgarian dragons!

You get an extra point for a set of white, red, or green "dragons" (credit to El-Guest for pointing out the relation to the colors of the Bulgarian flag).