universal bangers count but one can be influential without them and still get that top 10 co sign. kool g rap ain't got no universal bangers yet he's often considered a top 10 emcee and rightfully so
don't know what masta ace albums sales look like but everythin' that sells ain't great. emcees like rakim, kool g rap, and scarface are 3 some of the most influential emcees of all time yet they don't do jay z numbers. so sometimes the influence isn't always shown in numbers
as for other rappers mentionin' him, sure they do. everybody knows masta ace was a huge influence eminem. eminem recognized him at the 2001 grammy awards
(1) If you want Master Ace to be in your PERSONAL Top 10 then let him be....If you want him to be in the GENERALIZED hip hop top 10, then he simply can't be...Why...?
(2) The ONLY objective criteria is album sales and/or touring power...Everything else is just opinion, and people chose which criteria they want for their favourite MCs...
(3) Influence DOES NOT mean that you GOAT candidate...Any rapper who has ever trended has subsequently influenced the game...Lil Jon, Young Jeezy, Gucci Mane, Waka Flocka Flame, Chief Keef, Lil Reese and some others have been the most influential rappers (that most fans don't consider as GOAT candidates) in the past few years...
A "wack" rapper can have a BIG influence on the game, if he is popular...Hip Hop follows successful trends...Thus, influence is related to popularity...And Master Ace was never that popular, relatively speaking...
There was never a time when Master Ace was THAT RAPPER that hip hop in GENERAL was talking about....MC Hammer deserves a Top 10 spot before Master Ace...