I don't see how that is evidence that they are not going to charge a fee for used games, or allow 3rd parties to do it on their console ,especially since they filed the patent for it as well.

Eurogamer asked Shuhei Yoshida, head of Sony’s worldwide game development studios, if used games would function on PS4. At this, Eurogamer reports that he has to turn to the public relations specialist sitting in on the interview and ask what the official answer was. Following a brief consultation, he said, “Used games can play on PS4.”

They can? That’s a little different than “they will always, without an extra fee.” Nonetheless, many outlets reported this as closing the case for good. But then Game Informer wrote to Sony for a follow-up, and an unnamed spokesperson said this: “We are just now announcing the basic vision and strategy of PS4 and will have more information to share regarding used games later this year. But PlayStation has a long history of keeping its gamers happy and we won’t make decisions that damage our relationship with them.”

Also the eurogamer interview seems a little suspicious as well, why do you have to confer for an "official answer" on used games. As much as I don't want them to, I think Sony is implementing the same thing, and until they give us an "official answer" that states that used games will not require an additional fee, that seems to be the course. The fact that Xboxone has this makes it even more likely that Sony will follow suit to please 3rd parties.

What if Sony does it as well for 1st party games?

PS4 is not only the most powerful, but it will be the easiest platform to develop for. It will also work without an internet connection unlike the Xbox One. This is a huge plus in foreign countries.

The most powerful console never wins is a huge myth. There are tons of other factors that come in which are price, brand strength and game library. PS4 will be competitive on all fronts this gen and the will even launch at the same time.

Sony must rescue themselves or they might not be around.

Then don't buy Sony 1st party games. Buy  a Wii U if you have to. 

There is no indication Sony would do this. They do huge business in developing countries and requiring internet access to activate even single player games is ridiculous and anti-consumer. No, Sony isn't a saint, but they are also smart. There is more money to be made in NOT blocking used games.

Do you want to pay fee for used games?

Like the patent they filed for tech to block used games and the vagueness in which they have addressed the used game question. I can't say for sure if they will or not, but saying there is no indication is incorrect.

Does anybody?

So PS4 will not do that... that is what Yoshida said to Eurogamer... Sony will not do things that the gamers didn't want.

You know they've had patents like that pre-PS3 right? Never materialized.  A patent isn't proof of anything. If you only knew all the ridiculous patents that get filed.