Well none are Foss, so there's no solution for that problem yet.

Not all "Bitcoiners" are Bitcoiners, some are fiat Maxis.

Anyways, that being said an alternative, or competitor to a product needs to be as good, or better than the product it's competiting against.

Find what can be improved 😎👍.

Meetup > Flockstr because Flockstr development was abandoned and has horrible SEO.

Similarly, Luma has a greater reach and variety of events

Glad to see OPA continuing to improve though.