IN recent years Lagos, Nigeria’s biggest city, has become Africa’s most attractive tech hub for investors. But that could be imperilled by the government’s decision to suspend Twitter’s operations in the country. TOLU OLAREWAJU, Lecturer in Economics, Staffordshire University Although no direct connection has been drawn, the ban came two days after Twitter took down a tweet by President Muhammadu Buhari. Twitter claimed the message had been deleted because it violated its rules against “abusive behaviour”. The ban could be in retaliation. A new chill entered into the relationship between Nigeria and Twitter in mid-April when the social media platform…