Each plant will produce one fruit (yes, self fruitful). If the plant produces offshoots, then they can be planted and will fruit also. Otherwise you will need to root the top of the fruit to get another plant and ultimately another fruit.

Those plants were probably chemically induced to flower, and if they weren't mature enough the fruit will be small. Some varieties produce a lot of offshoots but others not so many. But you always end up with some extra plants at the end of fruiting. You can also sprout the top of a store bought pineapple if you particularly like the variety.

It is not going to be a big pineapple growing in a three gallon pot. Once the fruit develops, the mother plant doesn't grow any bigger. If the plant is small, then the fruit will be small. You can tell when the fruit will be small by counting the flowers rows from top to bottom. The average pineapple has 7 rows of flowers. 4 and 5 rows are very small pineapples.

I wouldn't say you necessarily need to plant it in an overly big pot for the suckers to grow; I grew this top out in a 4 or 5 gallonish pot and got a regular sized pineapples and loads of suckers, about 4 from the fruiting stem just under the base of the fruit and one from between the leaves. The one from between the leaves I left on the mother plant and it flowered this year about a year after the mother one did. First couple pictures are the original plant in the pot, last picture is this year's flower from the pup:

I started to twist it off in this one before I remembered to take a pic, so its bent down:

Bloom from the pup this year:

Pineapples only cost $2.50 at Walmart. No one can save much money growing it at home.

It is light green because I am not going to waste more money on fertilizer and I don't have the time to water them regularly.

Tony the same can be said of many of the veggies and fruits that people grow themselves instead of buying from the store; not everything is cost effective to grow home (eg. onions) but part of gardening is also for enjoyment, if it were just to save money I'd have failed long ago, also pineapple costs are relative to location as they can be $6 each here :)

Also up to you if you fertilize or not; my point was that you don't HAVE to use a big pot to get decent sized fruit or suckers. For most fruit trees the size or quantity of fruit will be reduced if you don't fertilize, pineapples are no exception. If you don't have time to water regularly feel free to invest in a timed drip setup, although I have found pineapples are suprisingly drought hardy as I am neglectful with watering mine too. Best wishes.

The Home Depot here in South Florida doesn't even sell pineapple plant because no one is going to pay that type of money for the plant. They can get the crown free from the $2.50 pineapple.

The hobbyist grows it from the crown. They don't buy store grown plants.

I agree with BahamaDan, gardening gives us a return that you don't get from spending money in a store. The value to us isn't a matter of comparison to the market cash value of the equivalent products. And whether a particular plant is or isn't sold by local nurseries isn't necessarily anything to go by. In my area pineapple plants are often sold in nurseries, and it's the tropics here, unlike Florida. From memory, BamahaDan is also in the tropics.

"The
Home Depot here in South Florida doesn't even sell pineapple plant
because no one is going to pay that type of money for the plant. They
can get the crown free from the $2.50 pineapple.

The hobbyist grows it from the crown. They don't buy store grown plants."

Not necessarily so. I have some 20+ pineapple plants with 7 plants bought, and I am looking to acquire more. There are good reasons for buying a plant.

1. If you want more than the varieties than the (generally unknown) varieties sold in stores. I have white Jade, Elite Gold, Florida Special (A reddish type), and Kona sugarloaf from plants I bought.

2. Store plants fruit faster than cut / rooted tops.

3. Store plants increase diversity to your collection.

4. Cut and rooted tops take 2+ years to fruit.

HD or Lowes offer the "garden" section as a convenience to customers and have limited inventories. Real nurseries like Excalibur in Boynton sell Pineapple plants.