Good idea, unfortunately, few users on Twitter in APAC. You should consider Weibo for China or Image recognition with Instagram or a mix of the two on Facebook is there is enough people having public content. Be careful on taking celebrities account's, they are usually not the ones posting. Gifts, could be a great way to start, but some industries will be willing to pay more per leads, like education, Finance, mortgage, ...

You guys are super smart, well done! moral question, using people's social data to profit and potentially manipulate people's preferences, like what Facebook is already doing, but deeper... does that bother you? Do you have thoughts on how to profit but not exploit?

Really good idea, might need more clarity in presenting your value prop

very original. scalability to be thought through

Good speech.