Please help! purple cayenne tips

[u/Grouchy_Pupusa]

I have been having trouble with my purple cayenne. I bought a small plant recently and let it grow. It has grown some fruits and 3 of them turned red. One was kinda soft and the other two were firm. But they had almost no spice. It was good and the color is nice. There are a few fruits left that are a dark purple and firm. But am I doing something wrong? I thought they would be spicy. Any tips and tricks is welcomed. I am rookie to this so I am open to any advice and suggestions.

Ps: I read on a Reddit I read there’s a seed exchange??? If there is when does that occur?