I am on this plan so my price will be grandfathered but the price is increasing to $40 on Nov 1st. Details.
If you purchase these plans before 1 November 2023, you can still activate the SIM any time before 1 January 2024 to enjoy the current plan inclusions with no impact.
You would probably need to provide more details about the $29 plan so people can decide its a bargain compared to the new plans being offered.