We bought a house in a Des Moines suburb that was in an HOA, however there was no board or dues or anything, just building and lot restrictions that are found in most building and zoning codes. The covenants stipulated that the HOA would expire in 30 years unless the owners got together and and voted to extend it for another 30 years. The 30 years were up five years after we bought and no one even knew about the HOA or the extension. I sure didn't say anything and it just quietly expired.
Even though the HOA long had expired, upon coming back from a vacation we found that the subdivision ornamental entrance fencing, signage, pillars, etc. had all been replaced by a new, upgraded entrance. Never heard a word about it and I still wonder who did it.