Wow, @jsmarjara , I see that all the cheap plans are excluded. Lol.
Also, if you go into the fine print, the add-on data at Lucky doesn't carry over and resets at the end of your plan cycle. Whereas at Public Mobile in-Canada add-on data stays in your account until you've completely used it up, whether that's in two days or two years (as long as your account is active, of course), and no matter what plan you are on, even if that plan does not include data.
If you are on a plan that properly reflects your needs and are only going over by a little bit once in a blue moon, 1GB can last you a very long time (I still have some hundred MB left on a 1GB add-on I bought in early 2018, so on average I have spent less than $1.25/30days on that add-on, vs $15/plan cycle with Lucky ...)