Whoever the real target market is, I suspect many of the policies have been sold to the owners of Apollos who don't know that there are such things as puncture-resistant tyres, or even chain lube and allen keys. Now that it's given away for free with motor breakdown that's probably even more likely.
Or at least if our marketing department came to me with that product I'd be sending them away to tell me how they avoid attracting that sort of customer.
In truth, I suspect the truth is that ETA do all of the policy admin and simply provide Ageas with a summary of premium received and claims paid, probably not even split down between cover type - lumping the bike breakdowns in with the motor breakdowns. ETA don't particularly care if the cover types are individually profitable, because they're remunerated by volume.