Pay is certainly comparable to Big 4, usually better. The market for this is cliquey certainly, but individual firms arent. What you would find is that the 4 you mention, effectively the leaders in this area and really the originators, are all actually very distinctive and each known for a particular 'flavour' of work. You cant confuse a WhatIf project with an Inzenka project. So until you know your way around, a clear hire for Market Gravity would probabluy not fit with Whatif etc. Dont discount KAE, still doing good stuff around this space too.One this though - once you have been to one of these firms, you probably wont want to return to mainstream consulting anyway. They are very execution focused, very nailed on to the concept of tying idea/strategy straight to revenue. And once you realise you are getting FTSE100s to invest properly big money and they are your ideas, it can be seductive. The issue - the big issue - is saturation even with only 5 or 6 main firms in the space, although Whatif and Inzenka both have international presence. The options for contracting are also very lucrative once you are established.A left field option, but infinitely more interesting than the usual merry-go-round of Big 4 moves before completing 3 of the 4 and wanting out altogether.