I did wish there was a Github link to see the code. I wanted to check if there was a theming option
I don't have either a Facebook nor Twitter account, and I certainly will not use my Google account for this. Yes, I know what OAuth is, and it is still a firm NO.
In this case you pay with your social details. Ultimately everyone decides for themselves whether they find the price acceptable or not.
The only plausible alternative would be to send out an email with a download link in it, but that "costs" the designer an email credit, real money, or potentially extra development time vs just shipping with an out of the box multi-auth component built into some web framework.
Perhaps I don't understand your goal: are you trying to collect email addresses to build a marketing list, or are you trying to give stuff away for free?
Sorry if these are dumb questions: the website doesn't really explain the business model (if there is one), or if this done out of the goodness of one's heart.
I imagine you want people to try a free template and then ask for your services to customize it? Is that how it works?
They could ask for my email address. That is not a problem. But I won't "log in" with my Google account and potentially leak, now or in the future, my contacts and other private information.
OP - really good stuff. I hope you do extremely well.
Yes, I know that I can review the permission. But I don't know what bug, exploits, permission changes, or mistakes will be made. I don't want to worry about that.
If they want an email address, I'll happily provide one. But I will not "log in" to their services.