Like the title says, I believe ACKs, especially this particular kickstarter, has the potential to be useful to other people who predominantly use a rules set other than ACKs. Similarly, I think it is on we, the dedicated few, to spread the message since Alex and any other Autarchs are hard at work making the best products possible.
It is further my belief that a single, random post to a community about a kickstarter or patreon is bound to be ignored/buried quickly underneath normal activity in either a G+ community or forum, so having each individual person pick whatever communities they're in and go nuts will not be effective.
Instead, if we use a G+ community as an example, we all propose G+ communities we are already a part of, make a single post there, and invite other members of this forum who are also part of that community to +1 the post and respond to it with testimony of how they think it relates. As an added bonus, if many of us are active on a thread, that's more opportunities for the curious to get responses to questions they might ask.
Obviously, testimony on how you converted ACKs material or rules subsystems for use in the system a community is centered around is good, but I think equally valid are any examples where you've used their material in ACKs, since it shows conversion is possible (and would presumably work in either direction). For example, if we were to talk in a Labyrinth Lord focused community, I could talk about how I've been able to use the Dyson Logos adventures from Dyson's Delves, which use LL descending AC, as points of adventure in my ACKs campaign.
The only caveat I would add is we should probably avoid astroturfing. If someone proposes a forum and you're not already a member of that forum, it's pretty sketchy for someone to sign up and only make one post endorsing some outside product. That being said, I looked on another forum mentioned the other day and I saw a bunch of familiar names discussing ACKs. Doing that again while promoting L&E or the Patreon could be a big boost for either endeavor.
Alright, with that out of the way, here are some G+ communities I'm part of that I think might be open to a post promoting L&E:
- B/X D&D (1098 members)
- Blueholme (983 members)
- D&D 5e (5516 members)
- Dungeons and Dragons (~9000 members)
- History RPGs (tabletop) (~1400 members)
- Lamentations of the Flame Princess (~1200 members)
- MEGADUNGEON (~450)
- One Page Dungeon Contest (~600)
- Original Dungeons & Dragons (OD&D) (~1400)
- OSR (~3500)
there's a few others, but they felt like a bit of a stretch, and of course some of these are probably already a stretch, but if anyone else is part of any of these communities and wants to try and get a post going, or if anyone wants to propose other communities. I don't generally do forums much besides this one, but it seems like other people do, so that would be a good thing to discuss as well.