A STEEM-based patreon supported by a condenser widget.
Many creators in the niche Steem ought to target relies heavily on their support through patreon. But last time I checked, the platform fees are way larger than what you would pay to buy into crypto, support a creator, and then have them sell into fiat again. Another smaller problem is that it is not really built into the platform the creators use (such as YouTube) and must instead be shared as a fugly link.
Having a STEEM-based patreon could create more demand for STEEM both directly and indirectly. The first being obvious and the second referring to how it would also help make Steem a more attractive platform for creators to have their content and drive their audience, as we really need more good reasons for people to choose steemit/steempeak etc over way more attractive platforms like medium. Finally, it is something people could use without making the full move to a Steem front-end and still create demand for Steem. Imo, more products that are Steem-based that users can use directly from their existing websites, blogs and content channels without making the full move over is good.
Edit: oh and maybe more creators would care to share their content and increase engagement if there was some added revenue stream that scaled with the number of followers who truly gave a shit.