There are entire countries where everyone speaks >= 3 languages. This poll would be more meaningful if we banned the Swiss. Also, most educated people from Indian subcontinent speak three language; their local tongue, the nation's lingua franca, and English.

Rule of thumb is: sizable minority language + official/ruling language + one international language:

Cantonese / Mandarin / English

Swedish / Finish / English

Tamazighi / Arabic / French

Basque / Castilian / English

I speak 3 and read another 3. My father is fluent in 5 and can bullshit in Russian. My maternal grandmother speaks 7; but she can't read or write :-)