I wish him the best on this endeavor. We've bought, rebuilt, redesigned Fotolog in 2017 and we failed to lift the social network, even with 50M users. The only solution I saw to this problem, isn't technology but convincing people to come back or use this social network over others.

I have learned that social networks obeys to generations more than to features. People only switch when a new generation operates on the social network. So, in order to make Orkut succesful, the founder will have to work hard to convince the new generation (those who know have 15yo onwards up to 24yo) to use the platform and gain ownership.