Reading the rumours here of mandatory IB is new to me.
If it were to happen I would be against it and simply and slowly look for another portal between our 'space' and guests that allows for the kind of relationship that Airbnb currently offers, which I believe is very special.
I have no way of measuring the veracity of such rumours but observe that it does seem to be a pre-supposition presently built into the Airbnb website that IB is thought to be more 'desirable'. For example, by offering a lightning badge and suggesting that bookings will increase (similar to the Beta smart pricing promises). Mandatory IB may contain subtle dangers to some of the founding values present in Airbnb's DNA.
In our first months of hosting we have resisted joining IB without apparent detriment to bookings.
We enjoy the ability through Airbnb to have a sense of 'reciprocity' between guest and host. Guest and host are in relationship in a complementary way in a kind of dialogue to discover and meet each others needs. This is a practical and congruent manifestation of ultra modern thinking in business practice and Airbnb as a portal is, in many ways, an example of it.
In our hosting we love to discover people who respond and engage with the space we are in and ongoing process of creating. Our guests help us to understand and develop the space through their appreciation and suggestions. This is a practical, flexible and resilient philosophy which seems to be working and which feels rewarding.
A key part of the sequence of this model is through the conversation that starts as a guest approaches us to stay here "Dear....we love your place and would love to come...." and this helps to establish this 'frame' as an ongoing 'conversation' between us. It seems to encourage host and guest to be at their best, creative self. Much flows from this which I will not go into here.
As hosts, for us at least, mandatory IB would disable the current start of this conversation and may allow bookings to be made with an older, les useful attitude to transaction where the opportunity to develop rapport is absent until much later (and may be more difficult to attain). As such I feel it's heartening (for the world) that younger guests really seem to 'get' this sense of conversation and co-creation completely naturally and respond with it. Perhaps they have less to unlearn. As hosts this kind of relationship is currently enabled (brilliantly) through the present qualities of the 'portal' of the airbnb website.