From humble choice february 2021.

This key is unfortunately extremely restricted, please make sure your country-code is not listed below before entering lottery.

Quote from humble bundle website:
"This key is not available in the countries listed below. If the gift recipient is located in one of these countries, they may not be able to redeem the key.

AE
AF
AL
AM
AO
AR
AZ
BD
BH
BI
BJ
BO
BR
BT
BW
BY
CD
CF
CG
CI
CL
CM
CN
CO
CR
CU
DO
DZ
EC
EG
EH
ER
ET
GA
GE
GF
GH
GM
GN
GQ
GT
GW
GY
HK
HN
ID
IL
IN
IQ
IR
JO
JP
KE
KG
KH
KM
KP
KR
KW
KZ
LA
LB
LK
LR
LS
LY
MA
MD
MK
ML
MM
MN
MO
MR
MW
MX
MY
MZ
NA
NE
NI
NP
OM
PA
PE
PH
PK
PR
PS
PY
QA
RS
RU
RW
SA
SD
SG
SL
SN
SO
SR
SS
SV
SY
SZ
TD
TG
TH
TJ
TM
TN
TR
TT
TW
TZ
UA
UG
UY
UZ
VE
VN
YE
ZA
ZM
ZW"