The biggest proof is watching internet dramas, this happens so often, this is where silent majority happens to, when something really es people off, you have a player outcry, you don't have that on SC. This is people that obviously follow the game to some extent, and i have high doubts that after the huge drama on SC that did echoed on all the media would not hit the majority of backers sooner or later, it's still not causing any player outcry. The drop of ED offline mode caused one player outcry for example, and like i said, even that was a minority over a majority that was okay with it. The obvious logic you don't need any proof to, is that people will speak out if it is to complain about something, people will not care to speak out on purpose to say nice things.
Another bad example. The player outcry that caused ED Offline was not so big as those who already happened with Star Citizen. You know why? The problem, my friend, is that what makes people not satisfied with Star Citizen and that affects their perception is not an event, a drama due a feature, or a bug, or a ship changed differently from advertise, or even a flight model that does not satisfy the public or disappoint, again, because it was advertised in a different way. It's the sum of the things, of people not liking, with the CIG's whole marketing/pr approach that is not occasional... its a constant.
You can be sure, that if ED claimed to be the BDSSE, that they are not like publishers who deliver a game unfinished, that they are not evil greedy, and that they sold U$2500 JPEGs of ships, the outcry about the offline would be a lot bigger and you would see a lot more outcries... because people would be already been constantly irritated by the company's attitude, so, the trend is they crying more for more things and if the devs really missed to deliver into their promises, or even if people didn't like, or their machines did not support the game, it won't matter... if the guilty is from the devs, is from you, from Derek Smart... that will cause harm for the game and for the company in the end, because the way that CIG advertised and sell their project to the public.
So, there is big cost in the long term, which is bigger, considering that CIG is not capable to deliver into their promises and is not capable to satisfy people, of been fast, and no doubt, it's easy to see they behind the competitors all the time and always trying to live from what is coming next, instead what really is there.
I don't believe much they will sell ships after release at all, like other MMOs, where you buy in-game currency, here, UEC, you can buy the ships with UEC on the same way, so there's no point on selling them if one will get to buy it if the player wants anyway, so the monetization happens either way. The said is the starter ship packs, all of them focused on starting into one of the activities the game will offer, and that is perfectly cool.
THE UEC sale will be limited and according with devs you wouldn't be able to buy a ship with the limit that you would have monthly. Probably, playing for some time, then using the additional credits bought by money would allow to buy a ship, a cheap one. At least, that is what they told in how they would balance to avoid pay-to-win. So, if they change this idea, they would be creating a scenario that would make them criticized in the same form as selling ships directly.
Besides, your perception clearly is stuck in the current time. You have to look to all this, not ignoring the fact that today, the things in the store are simply unavailable to be acquired by playing the game, and definitely, there is not really a lot of people supporting this madness of buying JPEG's, and what ends making the difference, in money achieved from a sale, are their ridiculous higher prices. I doubt that they will have people enough to sustain the future of this game, just buying $5, $10, $30 dollars monthly, possibly less people that they have today buying ships, because the things will be there, acquirable by gameplay. Won't pay the necessary monthly cost that this game "expanded" now requires and will continue to require after day 1, when the ship sales are supposed to be shutdown.
Meaning that this game would have a ridiculous bigger fidelity that they have today, to sustain the approach that was promised for after release. And all that they are doing, their marketing/pr approach, is making sure that the contrary happens... That they just get people's money and irritate them enough so they leave or do not feel good staying. The competitors obviously appreciates, because in general, people ends moving to them, specially in the Frontier case, which made the better design decisions, more in the same page with the reality of hte market and that prevented all problems that CIG will face, making them faster than CIG, and even with less resources, a lot less, not just hard to be beaten but hard to catch up, giving all the impression for the "silent" people, that does not follow the news so regularly, liking you or not, fairly or not, that are much more competent and less greedy than Mr. Roberts and they will prefer put their effort/fidelity on this, instead in the other.