Riley riddles galore!

Question

My new riley riddle is different.

Where my prefix is getting something from you,

Here my suffix makes food last longer,

You think my infix is on edge,

Under thinking it is not what I do.

$+$ Think it through

Answer 1

I'm going to guess:

Consideration

Where my prefix is getting something from you,

Con- A person tries to con you out of money or something valuable

Here my suffix makes food last longer,

Ration - Rationing food makes it last longer.

You think my infix is on edge,

Side- A triangle has 3 sides, three edges. Side of the road, edge of the road, they're pretty synonymous in some cases.

Under thinking it is not what I do.

If you give something consideration, it means you're thinking it over thoroughly.

+Think it through

Give this riddle some consideration.

Answer 2

How I haven't seen this one yet I'm not sure; but to begin breaking this down, the acrostic is:

WHYU $\leftarrow$ In which I believe the WHY is the only relevant portion.

Where my prefix is getting something from you,

I think this could be a literal statement in which we get a letter or letters from you. So the answer to this could be y, o, u, yo, yu, oy, ou, uy, uo; however, the only ones that make sense as a prefix would be y, o, u, yo, oy. Due to the acrostic containing a U I believe the letter is most likely U as it is what I would do; the letter U is difficult to use unless you're trying to ensure its usage as a hint, just like the letters Q, V, X, Z.

Here my suffix makes food last longer,

You think my infix is on edge,

I think the infix could possibly be e following the same concept as the prefix. Words that are synonymous to on edge are tense, excited, wired, nervous, eager, impatient, edgy, etc... and I believe the most likely words would be tense, eager, antsy, or edgy.

Under thinking it is not what I do.