...or spend $2/mo and get way more storage without the hassle. This fits into the same category as "you can get as much free catsup as you want from fast food restaurants" - not a really useful life hack.
Until google's automated process ban all those accounts. That method is used by many pirate video sites and they'll have to constantly play cat and mouse with google. Do not try it if your account contains anything important as once you got banned there is no way to restore your account due to absolute lack of human tech supports on google side.
Have you tried opening a dummy account lately on Google? You typically need a phone number to verify, and not some VOIP number but a major carrier. That is a lot of effort for 15GB of extra data, when you can just pay $12/mo for unlimited with G Suite.
Yes it is pretty difficult, and like I said they limit what phone numbers you can use. It ends up costing more money than just paying for additional storage.
iirc unlike Dropbox, files shared with you do not count against your quota on Google Drive as long as you don't add it to your drive.