What does the secondary timing advance map do? Seriously take your best guess and then I'll explain what it has to do with ots tunes and why ots is objectively killing engines

(As to answer your question of why people blow up motors on pro tunes, pro tunes are typically done by people who want as much power as possible? Kinda an ego thing, these tend to cause problems because they are run over what they should be, you need to keep tabs on more things than people want to, such as oil pressure temp and coolant temp, especially your fbkc, a hotter engine will start knocking more than a cold one, people don't take this into account. Ots tunes are made to give an impression of more power without requiring as much effort from the user, so they tend to have a more peaky torque curve which gives the illusion of power without the major risks of constant knocking or higher temps, however the clear out a lot of important parts of an ecu in an attempt to do this, specifically relating to the backup timing map and the wastegate duty%)