We can always use more data, especially from new contributors -- members and non-members alike. We need data both for the more populated areas and for the "empty squares" for which we have no data at all -- Ontario is a big place! And data on rare species is nice, but so is data for the common species. Lots of data is required to document where each species is found in Ontario and, for each area, the flight period and number of broods per year. Records for past years are also welcome.
If you are putting moth records on iNaturalist.ca, your are already contributing data to the atlas; every year we download this data and include it in the atlas.
iNaturalist includes an Moths of Ontario project; contributing to that makes your Ontario moth observations more easily viewed by others, and others are more likely to add identifications to your observations.