Many newcomers think that they can easily scam in this forum by offering such services. They may be successful in other forms but it is almost impossible to scam in bitcointalk as there are many eyes who are seeing and will warn you if they notice anything suspicious.
Those who tries to scam by posting this type of service, asking for loan or trading anything which can be used for scam are not newcomers. They just open new account to provide a service and few time they might be successful to make a scam from those who are not aware about the scam activity. Also, those who are scammer not only trying in this forum but also trying many platform.