You already know this, but same here. It's a toss up though because browsing is cheaper this way if you're going to light mobile sites (I can use 0.8 units over a couple minutes rather than 1.5-2.0 units on older TracFones), but MMS is just insanely expensive.
Castrol EDGE 5W-30 is my drug of choice.
Primary: iPhone 6s Plus 64GB, Galaxy Note 5, LG G5: 5 lines, 3x $5 Android web, 1x $2.99 T-Zones
Secondary: TracFones: iPhone 5s [AT&T] & iPhone 6 [Verizon]
Mobile Broadband: ZTE Z915 LTE hotspot (5GB for $10) + iPad Mini Retina w/ T-Mobile LTE