Yes, you can convince the people who write the tapatalk to include support for photopost classifieds in their next tapatalk release.

I don't think there's a big chance of that happening, but not trying has even less of a chance. They run a business and are motivated by profit. If implementing support for such software is going to bring more profit than implementing support for some other requests, I'm sure that they will do it.

But on our end we can not do anything because we have no control whatsoever over the tapatalk software that is on your device.