Nigeria isn't in the restricted countries list of Scoras. So, you won't face any problems there if you are playing from Nigeria. Anyway, I just checked the registration option using phone numbers and found that Scoras only offers phone number registration for users from Middle Eastern countries. I'm wondering why phone number registration is available for Middle Eastern countries only.
I find it to be of concern as, I don’t think there are a lot of users that would be open to doing a registration with cell phone numbers, except the casino isn’t really open to having a lot of patronage from that part of the world, the east. It isn’t really an advantage really, I think it is a limitation as people would always be open to email and username registration than cell phone numbers. Nut everyone are open to using cell phone numbers that they can do away with but, the story is a lot different for emails and usernames.
Actually they have option to use their email to register here in Scoras, I already done that and didn't get any problem since the registration process went smooth here.
I understand to concern towards using their cellphone numbers, since we provably aware about the risk and all of us don't want to get bothered by unnecessary text or calls from casinos.
Also for new sites like them, always do proper precaution and make sure they have back up dummy emails to use upon signing up on new casinos like them. Many got hype on them and I think they catch lots of attention due to attractive promotions they release to their new players.