Are these layouts responsive?
Yes. They mostly are. They obviously best viewed on desktops (1920x1080), but also mobile friendly.
Do they contain any advertisements for your site?
There will be only a short credit text to my site on the footer. Other than that, no.
Are files packed in a ZIP?
No. They all are in one HTML file. Otherwise, it would be very painful to debug and update them in the future.
Do they contain any hotlinks?
No, they don't. Which means, the layout's will never break in the future.
Are they suitable on any browser and OS?
I guess so. I usually make them based on Google Chrome and Windows OS.
Why do they contain Base64 codes for images?
I couldn't host the images from my own site, because the link would break in the future or the image requests would drain my bandwith. No worries though! You can decode the Base64 codes into image files here.
Can I use them commercially?
No. They are only made for indie, educational or personal sites.