According to Google product manager, Mr. Shimrit Ben-Yair confirms that Google+ have started to allow users to invite more people to the platform months after the service was limits to a certain amount of people. The development happened immediately when Google updated the service by providing all users a temporary links that can be posted anywhere on the internet which can enable everybody to join Google plus via the link.
Though, this new update have limits too but this time around, things looks somehow easy because you get power to invite about 150 people at once via your link without much hassle.
My link looks just like the one in the picture above but you can short that link to look more presentable than the one in this picture.
How to Invite Friends to Google Plus
This is very easy, you need to click invite button on the right sidebar of your google plus home page and you will see a popup box just like the one above and then copy the links that is inside the box provided by google+ to you below the popup box and start sharing the links on other social media sites like facebook and twitter and you can also share the links on your blog and forums easily.