Customers don't buy things when sellers make those things look like unappealing purchases.
We all know Public Mobile is a Telus-owned brand, they don't bother to disguise the fact (nor do they bother to invest anything into buikding or advertising or differentiating the PM brand). And it always makes sense for a multibrand company to position each brand subsidiary into niches which generate maximum overall revenue without cannibalizing each other.
So PM won't offer more appeal (like better LTE Plans, for example) than Koodo or Telus offer unless it becomes more established in consumer awareness. So Telus has apparently chosen to discourage then abandon LTE offerings on PM.
I think that's backwards, that it has cost and will continue to cost Telus in terms of customer loyalty. Instead of making the product worthless enough to sweep it out of the store they should've made it a better deal than anything the competition offers, you can't migrate a customer up the "value chain" and increase average revenue per customer after you've discouraged the customer from buying something which is sold cheaper somewhere else.
But hey, anti-competitive anti-consumer Big Three/Four oligopoly. Comfortable (tacit) status quo agreements which are best served by keeping the goodies away from PM (and PM's customers).
