Pros:
already has a working app is a significant point to stand out from peer, which can show investors the progress and how Tachain achieve their goal.
Share economies is the future key to use surplus capacity. If the app operate smoothly and stick to their roadmap, this is a promising coin.
Cons:
There are already some tokens doing the same thing by blockchain for the ads part(BAT, PRL and etc) It is hard to stand out from them especially in this kind of ICO sentiment and not so unique.
Facebook, uber and etc. already got big data and existing customers base, it also contain plenty of data for target advertising like Facebook ads and Ubereat's cooperation.