I want to allow guests to comment on the buddypress activity stream - buddypress

I have installed buddypress on my wordpress website. I want people to comment on activity stream without registration. Right now only logged in members can comment. Is there any plugin I can use to enhance this feature or do I have to modify the existing code to achieve this.

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Best practises around GitHub Apps if someone changes their username?

I am currently building a community around a GitHub app. People sign in with OAuth, and then they can "follow" other people.
However, in my database, I am only storing the numeric GitHub ID of the user, and not the GitHub username.
And if I want to display the GitHub username in the UI of people followed, I'd need to contact the GitHub API with the given GitHub user IDs.
If the list of users to fetch names for is long, that'd quickly exhaust my rate limits.
My question is: If I need to display the usernames of my users in a list, is it good practise to store the GitHub username in the database as well? And if that is the case, what happens if the GitHub user changes his/her username? How do I "listen" to that change and update the entry in my database as well?

Hangouts Chat - Send link to add bot to space

I am building a Google Hangouts Chat chatbot.
I need my bot to prompt users, following a dialog with another user. However, a conversation may not have been started with these users yet and I do not have permission to start one without being added to a DM space.
The current solution I envision is to prompt users by email. However, I cannot find a direct link to the bot, or that adds the bot to the user's space. Does such a link exist? Or do I have to send an email with instructions such as "Please go to chat.google.com and add the bot to a conversation"? I'm afraid this will generate strong churn.
Thank you.
Bots can only be added to a space by a user so yes, you will need to instruct the user to add them manually

Google+ new UI does not allow to share posts in LinkedIn

Did you notice that Google+ new user interface is lacking the ability
to share posts on LinkedIn?
Do you know if there is something I need to do to allow it?
Google+ never had the ability to share posts to LinkedIn.
I suspect that you have a chrome extension that provided this functionality, like Extended Share. The updated UI may require an update to the extension.

How would I reference a user account on bigcommerce so that they don't need 2 logins?

I have shop.domain.com, and in www.domain.com i have some social stuff going on with a blog, etc. I want users to be able to post comments on the blog, and use the social features without having to maintain 2 separate logins.
Can/should I use the webhook to capture their info when they register and send it my way?
I don't believe Webhooks are intended for what you are attempting to do. If you look at the events that Bigcommerce webhooks support
http://developer.bigcommerce.com/api/webhooks/quickstart
The majority of the events are transactional. You can subscribe for events when a customer is created, but there is no way for you to get a notification when somebody logs into your store.
Can't you include custom javascript in the store template that lets someone connect their Facebook or Twitter account, which can also be used to comment on your blog?

Google plus share using php

Is it possible to share some user activities (some url) to his google+ account directly with PHP (Not like a share button and having an popups or redirections)?
Please suggest me a best practice for doing the same.
Currently, it is only possible with the official Google+ Share Link, but this will render a pop-up.
https://developers.google.com/+/plugins/share/#sharelink
Google+ does not allow for direct writing to a user's stream without a user's direct interaction. You can write to a user's Google+ history after they've approved your application to do so and then the user can choose whether or not to share the moments to their circles or publicly.
The Google+ history is still in developer preview.