There are some Hakka communities in Hong Kong with traditional marriage culture. We hope to organize an online cultural show to promote diverse cultural traditions. After the show, we plan to collect all audience’s feedback via a mobile survey. If so, does it mean that we use a non-probability sampling method by conducting a mobile survey?

There are some Hakka communities in Hong Kong with traditional marriage culture. We hope to organize an online cultural show to promote diverse cultural traditions. After the show, we plan to collect all audience's feedback via a mobile survey. If so, does it mean that we use a non-probability sampling method by conducting a mobile survey?