Knowingly profiting from crimes is still illegal, so you might be liable, too.

If you can’t prove that you told Google that you are a private person using a business account, you might end up having to repay and end up with a fine.

This reason made me to create new gmail account in order to use Project Fi. I really don't understand why Google releases product for gmail user only. They advertised google apps for work as custom domain at first.

By now, many of us have app and content purchases tied to those accounts, and migrating from Gmail/Drive/Photos isn't practical, so we're stuck getting new Google features later or never.

The only good way to use a custom domain with Google is to pay. Clearly a lot of us are happy doing so. I know I pay around £200 per year to Google for my one account, the storage and media subscriptions (music, magazines, etc)... But for this I get incomplete features (Now) and locked out of some services (Play Family).

I use (paid) Google Apps for personal & family stuff - and this seems like a pretty arbitrary restriction on Play Music.

Anecdotally - I was a longtime Rdio user, from beta until they recently closed. I did the trial of Google Play Music and it's not only the best good product I've ever used, but I have already gifted 6 months to my sister. Christmas is coming up, and I'm tempted to gift it again to other people.

If you enjoy music and haven't checked out Google Play Music, I'd encourage you to give it a shot. So far it's everything I've wanted plus more!

I'm using Google Apps actually but I don't expect Google allow me to share my account with my family.

And even if, as you say, it is "for work", why does Google force that decision upon me, the owner/operator/admin/sole employee of my one man organization? Why can't it just be a check box that says "I really just want a custom domain. Please let me use the cool things you make"?

It's infuriating. I have no problem paying $5/month just for a custom domain on a standard Gmail account, but it's not possible. This is the only other option, and if I had known how much frustration it would cause I'd never have used my Apps account as my primary for the past years as I now have numerous purchases, domains, email archives, photos, and so on attached to it.

Probably because it's not just a matter of marking it enabled. For example, I wouldn't be surprised if they used two separated branches of the codebase, only merging features from regular services into Apps after they are more stable.