(I think the weirdest tip I have about Lagos is that it's actually a decent whale-watching spot. We get humpback whales in particular from May-ish to September-ish, much more in the latter months.)
I live in Indonesia on the "series of tourist visas" work-around. Getting a work visa is hard because I don't have an Indonesian employer to sponsor me or the money to start a proper entrepreneur visa. There are probably some work-around available by having an Indonesian found the company and "employ" me, but it's all very iffy and quickly becomes complex. When I looked at options a few years ago something similar applied to most countries.
It's their country and they can do what they want, but it seems to me that it's kind of a missed opportunity.
1. https://www.payscale.com/research/BY/Job=Software_Developer/...
That's for a very fresh out of uni junior outside of London though. You'd struggle to find someone willing to work for that nowadays.