Texts or emails with "interested?" at the end seem to often be preceded by some amazing offer you will not be able to refuse. The last series of such messages came from a man who wanted an outcall to a location a good 1 hour drive away, who couldn't commit to a time, and wanted a visit at a really 'out of hours' time, and couldn't prove his location, at various intervals he sent several more emails pretty much the same, continuing to ask"interested?", "still interested?". To which I then replied with "No thanks".