Preheat the oven to 500˚. Set a wire rack on each of 2 rimmed baking sheets. Heat the vegetable oil and bacon in a large nonstick skillet over medium-high heat. Cook, turning occasionally, until crisp, 8 to 10 minutes. Transfer the bacon to paper towels to drain, then chop. Pour the drippings into a small bowl and wipe out the skillet.
Return the skillet to medium-high heat. Lightly brush 1 tortilla with the reserved bacon drippings. Add to the skillet and cook until lightly browned on the bottom, about 2 minutes. Flip and cook, rotating the tortilla and gently pressing it with a spatula, until crisp, about 3 minutes. Transfer to one of the racks, crisp-side down. Repeat with the remaining tortillas and bacon drippings, reducing the heat if the tortillas are browning too quickly.
Spread the pizza sauce on the tortillas, then sprinkle with the mozzarella, chopped bacon and pickled jalapenos. Working in batches, bake the pizzas, 1 baking sheet at a time, until the cheese is melted and bubbling, about 8 minutes.
Microwave the cream cheese in a small microwave-safe bowl until runny, about 30 seconds. Stir in the jalapeno brine and season with salt and pepper. Drizzle on the pizzas. Cut into wedges.