I find the survey a bit short term focused on some of the questions, being some delimited to the last month (i.e. number of exchanges to fiat, LN payment) and the specific crypto to crypto exchanges to just last week. Those timeframes will capture a snapshot of information for those that are traders for example, but will likely render small positive results for those that are holders. It also does not show long term behavioural trends, but only short term, although it really depends on your goals here. Additionally, the list of exchanges excludes some of the major ones, which seems odd.