Not sure they will be any more effective than PAII. Or state associations, or regional associations. The concept that these or other associations "advocate" for their members never seems to bring much real benefit, that I have visibly seen. And if they actually manage to have involvement in even a small benefit, they will trumpet it loudly.
Will TripAdvisor change their fee if any association intervenes, seriously? Will the fire/safety folks reduce zoning/code requirements? There is a term "slacktivism" - surveys go viral seeking people to "take a stand", benefits, etc. where it feels good and it can have a broad appeal, but the final result is none to minimal.
Personally, I was a member of Chamber of Commerce (rural - twice) for past businesses. I had two views of it - I never had a single traceable customer even though I was active - but meeting other business owners was nice. Secondly, they seemed to exist to perpetuate itself - benefits, annual meetings, etc..
I am going to get snarky. YES, I said SNARKY. You are not an innkeeper. You have NO history of what is or is not with the industry yet pontificate as if you know all.
State organizations DO work for the members - and the more members get involved, the better they work for you. MY State Assoc got legislation that was needed PASSED. We advocate and market for the members - and mentor.
PAII in the past WAS an educational source and then with a wonderful advocate the B & B industry DID get a seat at the table. It went off the rails a bit and lost a LOT of us with it. It was a FOR PROFIT that was not making a profit.
This new organization is a non-profit and I for one am willing to toss a few dollars into the pot to see if it will fly. And I am NOT known for throwing money I do not have around.
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