The linked site is an application for sending and discussing links with your friends, not for exchanging money. I think the distinction is quite clear.
I AM NOT A LAWYER AND KNOW NOTHING ABOUT WHAT IM SAYING - TAKE THAT INTO CONSIDERATION WHEN YOU READ BELOW.
IANAL, but it doesn't appear that you infringe on anything. A trademark is only valid for products or services which appear to be, or are similar to, the scope of registration. This can include scope for 'natural growth' into other areas.
All their trademarks seem specifically about the exchange of currency. There is nothing there relating to sharing and discussing links with your friends, or even broader classification which they could most certainly have registered for.
That said, you should speak with someone a lot more knowledgeable than me about it!
Or via any IM app you and your group of friends are already using.
The site doesn't say a lot, so I can only guess, but the only way this could be useful or at least add something new would be to not require the receiver to use the app (receive by mail, by fb message, etc) and to add semantic (e.g. tags) and archiving (kind of social shared bookmarks?) capabilities.
Or maybe it's just an early released MVP not to be taken very seriously. I hope it's this last option, as I don't see no added value so far.
I would like to be able to create tags and associate people with those tags, so that I can just tag a link and it will automatically be sent to those people, only if they have not already seen the link -- otherwise add me to their conversation so I can read what have already been written about it.
That way we won't have to disturb each other for being late to the party.
Pushbullet does this really well. The only problem I have with it, is that when I do send a link to my cellphone and I touch it in the app, it automatically opens it in Chrome. Then I still need to select the URL there, copy it and paste it in WhatsApp. Or maybe I am missing something?
Better description: an iPhone app for sending links to a subset of your friends which use an iPhone, don't care about privacy and install each and every stupid app just after it is released. Correct me if I'm wrong.