Matt Cutts (head of Googles webspam team) Strongly advises that you don't pay for any links. This would include a link from any paid directory.
That is why I asked if you are planing to make this a paid service at some point. Also, your site seems to be down (as far as submitting a site goes)
What is your Google PR and age of your site? No offense... I just need to be extra careful because this is a clients website. I think you are doing a amazing thing for the community!!!
Well, i cannot follow all new google developments all the time, so it's possible they stopped liking payed links... Cannot comment on this, since it's more or less a black box for me
About my google PR: at the moment, it's a brand new concept i'm developing. The domain has no age, and no PR
The whole concept is pretty simple tough, and everybody should benefit from it: i'll try to maintain a clean directory, and try to make sure only "clean" websites stay listed (in other words: i'll try to remove websites that scam, spam, ponzi's, high risk investments, websites that stop taking cryptocurrency). I do allow everything that is legal and not trying to rip of people.
The bottom line is: i want people to see my directory as a single-stop for cryptocurrency owners... IF somebody holding some BTC, LTC, DOGE, XMG,... wants to buy something online, their first tought should be : "let's check out buywithbtc.biz for shops that sell the stuff i want to buy, and accept my BTC"...
Everybody can submit busnisses, completely free. If they place a link back, and contribute to my PR and send some traffic my way, they'll be rewarded with a hardlink and better placement. If they don't place a link back, but provide a good service, they still get a listing.