To be honest?
I do not use that many amps and if I do, it's mostly amp 2.
IF mining HR is abnormal high I might use an amp 5.
How big multipliers might be? No idea at all cause I do not mine for those, only for fun and some profit if possible
I only use my F-106 so no idea how other finders react
For the multipliers ... hope nobody shoots me lol, I can only say that I think they are there for gamblers and nothing but gamblers, that are seeking for a big bang that prolly will never happen.
I see a global/hof as an extra I get, but no idea who or what triggers it. As I've been mining those where extra's, since my TT returns where mostly already over 100% and that I call safe mining (unamped/amp2), no gambling at all.
Some say you get TT, decay etc ... payed back, I do not believe this, ALL I believe are the numbers I see in my excel files and from others in soc no matter what finder/amp they use. I have seen many trying for big hits with big amps ... They ALL lost big time... except for Jenna
en myself (but that was years ago when it was completely different. Those that have the peds to run around and mine with them, they might ofc get a nice tower 1 day sure, but still that doesn't mean they made profit. Even running around with no amp, I might get a tower, who knows, but that chance is ofc a lot smaller.
As mining is now ( 80-90% TT return/unamped) the chance of having a biggy might be bigger cause the community of miners is paying (more) for it. Future will tell. In the past 2 weeks after the update my returns are constant lower, I even get multipliers/globals and like I said above they do NOT bring me back to the 100% as a payback for the TT spend. They never did and they will never do that.
MA is no charity, if you want to make profit ingame, you need to do that yourself
This is all my interpretation.
Cheerzzzz and gl