you know what, people can buy review and feedbacks...
since the price of BTC is rising... for example, they spend $10000 to buy good reviews and feedbacks all over the internet...that's only 1 BTC now.
the point is : this is not good for the future of crypto coins,
the coins need real apps to keep the price, but not only a symbol/number for exchange!
I have to agree that reviews and feedback can be bought... However, i think it's pretty hard to buy/cheat/fake the complete picture while leaving no evidence for law enforcement. I mean:
a) if you have positive reviews on several different review sites
b) combined with an official label (for example: in my country a webshop can apply for an "official" label they can hotlink from a official site, if a webshop has this label, and it's hotlinked correctly you are sure that the identity of the owner is verified)
c) combined with whois records that are filled with real, verifiable data
d) combined with an ssl certificate filled with real, verifiable data
e) combined with real VAT and contact info published on your site
f) combined with an office location that actually points to a real office registered to the company you're buying from
g) combined with linkbacks from trustable sources
h) combined with the absense of scam reports linked to your site
I think that if you're able to check all (or allmost all) of these points, the chances of being scammed are pretty small...
But that's just my opinion.
I do fail to understand what you're trying to say with this sentence: "the coins need real apps to keep the price, but not only a symbol/number for exchange!". Bitcoin existed before exchanges existed. There are real apps around, but i fail to see how an app can keep the price (unless you just mean price tickers, but i fail to see where they would fit in the picture... I mean, they also exist for a long time, but it's not like they help people that are about to be scammed)