Yeah, no. These things are in all probability made with a certain thing that 'sketchyfies' either drawings or photographs. I strongly recognise the look of the drawings from a website that I can't find at the moment. The thing connects drawn lines with a multitude of hair-fine lines as if bound together by a sketchy spiderweb or something.
Please give the originals-originals, not the processed ones.
I apologise if you in some weird, weird way actually drew these but I am like 83,6% sure you didn't, which is quite high a percentage of sureness for me. If so though, please prove me wrong by drawing something in a different style or non-digitally.