From Affinity's site[1]:

>Canva’s business model is subscription, are there any plans to change how Affinity is sold? > >There are no changes to our current pricing model planned at this time, with all our apps still available as a one-off purchase. Existing Affinity users will be able to continue to use your apps in perpetuity as they were originally purchased – with plenty of free updates to V2 still to look forward to!

I guess the keywords are “at this time”.

[1] https://affinity.serif.com/en-us/press/newsroom/canva-statem...