If traditional data gave enough information, big data ___such an important marketing tool 1.wouldn't have become 2.wouldn't be become 為什麼不是2?

If traditional data "had given" enough information, big data "wouldn't have become" such an important marketing tool.
條件子句用假設語氣的「過去完成式」，表示條件過去不存在；主要子句用「過去的未來完成式」的would have p.p.，表示這結果過去也不存在。

If traditional data "gave" enough information, big data "wouldn't become" an important marketing tool
條件子句用假設語氣的「過去簡單式」，表示條件現在不存在；主要子句用「過去的未來」wouldn't become，表示之後也不存在。

become不會有be + become的組合，因為become是「不及物動詞」，而be + p.p.的是及物動詞才有的「被動態」形式。

「過去的未來」是在「過去」之後的過去時段內，時序有先後之分。

你給的問題裡的條件子句，可能打錯動詞時態了？

Note that you use the past tense of the verb in the if clause;

In expressing wishes and longings, in conditional sentence, in discussing probabilities, suggestions,comments to be expected, advice and opinions, you use the conditional.

If traditional gave enough, big data wouldn't have become-------
Big data wouldn't have become such an important tool, if traditional gave enough......
"wouldn't have become" used instead of "wouldn't become=express a request, a proposal, not a probability"
2. wouldn't be become==/==wouldn't become.