为了 vs 因为

为了 aims forward at a goal — "in order to" (为了感谢您); 因为 points back at a cause — "because" (因为下雨，比赛取消了).

为了為了

wèile ㄨㄟˋ ㄌㄜ˙

for; for the purpose of; in order to

为了感谢您，这里有份礼物。

To thank you, here is a gift.

因为因為

yīnwèi ㄧㄣㄨㄟˋ

because; owing to; on account of

因为下雨，比赛取消了。

Because it rained, the match was cancelled.

In LinZi, pulling up a comparison is one tap inside a review, no context switch, no lost queue position.