help me with english~ please?

[Ms. Worth]

LOL! Hi, Steve.

The sentence is just a rearrangement of the familiar verb forms. It's not the pattern that you suggest.

The sentence says:
1) Twitter has grown.
2) The ways people and communities use it have grown too.

It is this second half that has been rearranged to say "and so (too) have (grown) the ways people and communities use it."
The verb is assumed to be next to the auxiliary, but it is not explicitly repeated because it is understood.

> My husband adores my Tuna Surprise, and so do my kids.

> The dog has learned to beg for treats, and so have the cats (learned to beg for treats.)

> As advertising has grown, so too have the doubts of consumers, and regulatory agencies, about its honesty.
(Advertising has grown, and the doubts people feel have grown as well... "... so too have (grown) the doubts....")

> Because sales have declined, so too has the commitment of upper management to this product.
( ... so too has (declined) the commitment of management....)

A common usage form for this kind of ellipsis:
> As media attention faded, so did the dedication of the protesters.
(... so (too) did (fade) the dedication of the protesters.)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These are all variations on the English idiom "so do" (or "so have (done)")

"Do" replaces any verb, and the expression "so do" means that the verb is understood to be repeated for a second subject:
> Mary went to New York City and so did I.

> After Paul took up hockey, so did many of the other kids in the neighborhood.

> Alice has become more sophisticated as a result of her exposure to new ideas at the University, and so have the judgments and opinions she holds about literature.
Alice has become more sophisticated, and so have her opinions (become more sophisticated.)

> Sammy has a dog and so do I.
(In this case the verb "has" is not an auxiliary verb, but the verb "to possess." Sometimes this sentence is said: "Sammy has a dog and so have I," but I think that is mostly BE and not AE -- and certainly not informal American speech.)