We do get your point, and thanks a mil for the feedback...
We'd love to make the approval process faster but we just don't have enough resources for now. yes, the approval is to keep the spammers at bay - you have no idea how many spammers we reject everyday!
We are however always adding more moderators to help us with this task. Happy to make you a moderator if you'd like help, please send email on admin@techzim.co.zw