Thank you! =)
hah, your edit just popped up when I wanted to ask for a link XD
I just had a look at your patreon, it looks solid, however there might be a few things you might want to consider:
- adding images to your tiers helps a lot - people love visualizing. Maybe if you get your hands on the planned ipad, you could draw those tier medals? =) Maybe even offer a downloadable icon to put into someone's profile, like "[COFFEE MEDAL] - I support @jcmraz on patreon"?
- I personally would raise some of the tier prices, those numbers are very close together - maybe spread the tiers you have right now to at least $10 (or even more) for the highest tier? I mean, you ARE offering individualized artwork, after all
I suggest 1-3-5-10 $ tiers =)
- a word of advice on offering monthly individual sketches, since I have made that experience: Limit those tiers!
I have a tier where I offer monthly sketches myself and I had to limit it to 5 patrons, or else I would not have been able to keep up the work on my comic, which is - after all - the main reason you are doing a patreon, right?
People love personalized art. I love personalized art, however keep in mind that your day has only 24 hours and your time is limited since you have to care for yourself and your family as well. It is not easy, but you have to find a healthy balance there - I'd highly recommend limiting personalized sketches etc to a maximum of 5 patrons for a start. If everything works out well, you can always offer more slots on that particular tier.
- One thing you could do to give your tiers more structure is writing "all of the above" instead of copypasting everything from the lower tier - it makes people browse through all of the tiers instead of just focusing on one =)
- maybe make the occasional teaser or sneak peek to a comic page/special project accesible for all, not patron-only? So Non-patrons can see what they are missing out?
- Also, phrases like "patron only sketches" etc add a flair of exclusivity to your stuff - after all, your patrons are the ones who support you and they have every right to feel like the special and wonderful people they are
Aside from these details, I like your patreon - your offer of rewards is very generous and interesting. You have the right amount of tiers (recommended are 3-5), your rewards are solid... so actually it is only a matter of visibility now.
I have checked out your comic on tapas, as well - one more advice I can give you is to use the banner under each episode with a special patreon-link - so far you are linking to your webcomic itself. I highly recommend setting that link to your patreon instead =)
I love the information illustration under your newest comic pages though - all the necessary information in one place, well done! 
Aaaand finally regarding your twitter: You update and inform regularly, however due to the algorithm you won't be getting far with your postings without tagging anyone!
I suggest you @ ComicSolidarity, when you are in the German Comic Scene, aside from that, WebComicChat, WebComicAvenue, ArtOfWebcomics, WebComicNetwork, topwebcomics, WebcomicNetwork, DiscoverComics, WebcomicsMojo etc are good.
Spice up with hashtags like # indiecomics, if applicable: visiblewomen, artistsontwitter or smallartistclub and keep an eye out for what is trending. =)
I hope I was able to provide something useful that helps your webcomic to grow! Please let me know if you have any more questions, or write me a DM.
All the best of luck! 