Hi Tripy.
Firstly, a few spelling/grammar corrections:
1) On second line down, first paragraph, correct "poducts" to "products"

(same in all of the "what is it about?" sections)
2) I suggest you change "integrate web site
s screenshots" into "integrate web site screenshots" - just remove the s, or you could add a ' after the s, but I think the first idea looks and reads better
3) The header on the product info says "product infos", not "product info"
4) On features page, under reliability, change it to read "the system relies upon" rather than "the system rely uppon".
5) On the features page under "real time", change "unless" to "unlike" I think.
6) In the 50% reduction section, I think it is supposed to read "the more hits
that are done...."
7) On the service pricing page, correct the spelling mistake in the header from "service pricning" to "service pricing".
8) On the service pricing page, under the bonus table, change "buyed" to "bought".
9) On the same page, change "it seems normal for us that you don't pay
a full cost for it" to "it seems normal for us that you don't pay
the full cost for it"
10) On the signup page, change "pricvacy" to "privacy".
11) On the /customer/tags page, under the professional box which is in pink, change "IP adresses" to "IP addresses".
Right. After all of that is now over, I think the site design is fairly good and quite suiting and it's very easy to navigate

The idea is a good one and I think it will work for you, especially since your domain name is very suiting for it - well done.
One thing however with the URL - might it be possible for people to work out that uid=6 means user ID is no. 6, and therefore people could use someone elses credits etc. A suggestion for this would be to change uid=6 to something like ahbd=143 (something random and unguessable) which would make this less easy to guess. Also by spacing customers out could help - instead of customers starting at 1 then 2, 3, 4, 5, 6, 7 etc., they could be like 5, 43, 98, 143 etc. so that it would be less easy for people to use others credits. Just a thought.
Hope I've been able to help.
Talkupation appreciated

Dan