I may use them, it all depends on their rates and also how many other people use it. If there are affiliates that pay via GBuy then I may have to use it if I want to get paid from the affiliate program. About spammers spaming Google, I think that can be sorted out. When new sites get in they should only really allow them to have a certain amount of pages listed like they normally do, but when they do the full crawl of the site, they should have a limit that when it reaches a certain amount of pages it should red flag the site and not crawl anymore of it. Once the site has a red flag, an employee from Google should manually go to the site and look at it and see if it is breaking any search TOS. If it is then it should be banned, if it is not then they should approve it so that the whole site can be crawled. But even this way I guess that a site could be legit one minute and then do black hat seo the next.
It'll also depends on how many merchants pick it up. If it's widespread and more convenient than PP I can see the majority of people switching to it.
Yeah, It is all about what features they offer their merchants and how good customer support is and their service in whole, plus their rates. If these out way Paypal features then more merchants may turn to Googles one.
In the end, competition in this space is good. Anything that will lessen PayPal's stranglehold on this space is ok by me!
I'm throwing caution to the wind on this one, if gbuy becomes the money transfer standard then i'll join the bandwaggon but at the moment i'm happy to stick with paypal.
I like google and since paypal only offers to a few countries it would be great if gbuy goes international