Community reward is the highest amount but requires the most effort. Ever since, the migrations have become common occurrence, the referral credit has pretty much been decimated. Nobody stays long enough for the referring party to collect even a dab of pocket lint.
Public Mobile 2016 fall promo, $23/1GB, $38/5GB, $28 RBC 5GB promo
Fido $0.00/3GB+tablet, $10/4GB+tablet