Instant Action Sports have mainly done US business in the past… and they have tried to go into Europe a few times, but never really followed up with any of the affiliates that I have talked to.
They have been contacting me once a year over some 3 years period. But they just waste your time by showing a lot of interest, and then they just suddenly dissapear.
They are too unsesrious to get involved with.
Havent heard much about BetJoint.
Instead I would recommend that you decide what type of acknowledged sportsbook you want to promote among the two: The more US branded sportsbook or the European faced bookie. Among these you will find many operators to chose from that you will be more happy to work with.