So assuming that blind is true (why ever would it not be?), I can well believe TH would go to any lengths to raise his profile in the States, he has famewhore written all over him.
We've established that TayTay has no need to date some B list British actor for publicity, but perhaps dating a good looking English guy as a fuck-you to CH was enough incentive for her - good old Rebound therapy.
OR, perhaps, just perhaps, she's genuinely smitten by him and she's getting used...?
Or a combo of all of the above?