Here is the simple truth, IMHO:
Who are YTL's target market?
1. People who are on the go and need mobile internet
2. People who need average internet consumption, to surf net, email, chat, fb, twitter, blog
3. People who wants an all in one billing package for their voice, phone internet and mobile internet all in one
Who are NOT YTL's target market?
1. People who love torrenting or does massive downloading everyday
If you download a movie everyday, please stay away from Yes. Stick to Streamyx.
If you just want to watch Youtube and play some games, chat, read emails, surf the net and want the flexibility of doing it everywhere you go, then you can choose Yes.
Simple reason why YTL chose this path. Mobile internet infrastructure is not like Unifi which has are connected by fiber. If they chose the "Unlimited" path, then they will soon become P1 and WILL suffer congestion because everyone will start torrenting, killing service to the average user.
Remember, YTL never said they are faster or better than DSL. They always say they are faster and better than 3G.

Truer words have never been spoken.
But that bit about the youtube though.... YT CAN rack up usage pretty fast.. especially in HD.. so YES sorta discourages youtube too....
Love to check mail, and browse sites? Step right up, and join us (YES) like its the 1990s all over again! XD
4G is NOT the FUTURE! Show me one provider that can beat fiber and i'll show you my rear end... XD