Comment posted on Features by Aurimas
If plugin is activated it ads metatag into header and tells the google to index the content but prevents it from caching. You can check sites header and metatags to understand how it works.
Plugin is also able to detect googlebot and if googlebot comes to the site content is exposed to it as if it was user who purchased the content. As google is not allowed to cache the sites contetn it will never show the content under cached version 
So you blog can still be indexed by google your users can find it by keywords residing in a hidden area and they still has to pay for it …
Aurimas also commented
- I am thinking about these improvements for a while. Those are a very good features to implement I’ll put them on a list of things to do.
- It is impossible to use this plugin to secure pdf content. This plugin can only be used to secure wordpress bog posts and pages. You could have secret pdf download urls and you could use this plugin to hide those urls from unpaid users. But in this case paid user will be able to download the pdf and to redistribute it
Recent comments by Aurimas
- FAQ
paypal sends ipn posts to the blog and everything what comes from paypal gets registered in there.
Yes csv or txt export of the data could be a good thing. - FAQ
Content will be hidden if you will have no price for it – no 0, but compleately empty – try to clear it using clear button next to post price. this is my bug I should check if its 0 or empty before sending it to paypal. I will put this to be fixed for next version. - Are PayPal 1.7.7 version was released
try to click the button “restore defaults” or similar (I do not recall the label of the button) under templates. It should be ok. - Are PayPal 1.7.7 version was released
Check generated html for buttons maybe you will notice something unusual. Try to reset button templates if so. Try to identify if this is not due to your paypal account configuration. - Are PayPal 1.7.7 version was released
up to my knowledge it is compatible with latest wordpress versions. It can be I forgot to update headers of the plugin to state that. Please try to install empty wordpress blog with only are paypal plugin on it. In many cases it was some other plugin interfering and giving errors. If there will be no progress let me know I’ll contact you by email and I’ll take a look at your blog. I like to troubleshoot wordpress plugin errors.
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Will this plugin work for selling aneBook that’s is a PDF? Want to secure it some how so buyers don’t go and distribute it.
Comment by Peter Hutton — January 4, 2010 @ 1:39 pm
It is impossible to use this plugin to secure pdf content. This plugin can only be used to secure wordpress bog posts and pages. You could have secret pdf download urls and you could use this plugin to hide those urls from unpaid users. But in this case paid user will be able to download the pdf and to redistribute it
Comment by Aurimas — January 5, 2010 @ 12:21 pm
Glad I found this plug in. We are setting a site to sell post by post content, and we test your plug in.
After installing it, I found several things that will be great if they were implemented.
1.- The tag for hidden content is to long and difficult to memorise. Could be possible for the Administrator to change it to a custom tag, from the settings plugin. Implementing a field to enter the tag we would like to hide the content.
2.- It would be great if a button can be added to the visual editor for setting the tag in the post, or formatting the hidden post. We write the post, select the paragraphs to hide and then press a button in the editor or use the format list (as it is implemented in the visual_code plug in).
Comment by Enrique — January 20, 2010 @ 1:57 am
I am thinking about these improvements for a while. Those are a very good features to implement I’ll put them on a list of things to do.
Comment by Aurimas — January 20, 2010 @ 11:15 am
when you say that googlebot can index hidden content, what do you mean exactly – if it can be indexed then is it not visible in google’s cached pages ?
Comment by Bob Murphy — July 2, 2010 @ 12:29 am
If plugin is activated it ads metatag into header and tells the google to index the content but prevents it from caching. You can check sites header and metatags to understand how it works.
So you blog can still be indexed by google your users can find it by keywords residing in a hidden area and they still has to pay for it …
Plugin is also able to detect googlebot and if googlebot comes to the site content is exposed to it as if it was user who purchased the content. As google is not allowed to cache the sites contetn it will never show the content under cached version
Comment by Aurimas — July 2, 2010 @ 2:29 am