<?xml version="1.0" encoding="utf-8"?>
<link:linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <!-- INTEGIX by Ez-XBRL -->
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    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_CliffordStarkeMember" xlink:label="loc_zstk_CliffordStarkeMember_4"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_SammyDorfMember" xlink:label="loc_zstk_SammyDorfMember_5"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanyVaimanMember" xlink:label="loc_zstk_DanyVaimanMember_6"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_LuisMerchanMember" xlink:label="loc_zstk_LuisMerchanMember_7"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_HusseinRakineMember" xlink:label="loc_zstk_HusseinRakineMember_8"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MatthewCohenMember" xlink:label="loc_zstk_MatthewCohenMember_9"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanielReisFariaMember" xlink:label="loc_zstk_DanielReisFariaMember_10"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MichaelHeinrichMember" xlink:label="loc_zstk_MichaelHeinrichMember_11"/>
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    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_SammyDorfMember_5" order="1002" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_DanyVaimanMember_6" order="1003" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
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    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_HusseinRakineMember_8" order="1005" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
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    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_DanielReisFariaMember_10" order="1007" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_MichaelHeinrichMember_11" order="1008" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
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  <link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure">
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember" xlink:label="loc_ecd_AllIndividualsMember_0"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_Director1Member" xlink:label="loc_zstk_Director1Member_5"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_Director2Member" xlink:label="loc_zstk_Director2Member_6"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_Director1Member_5" order="1001" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember_0" xlink:to="loc_zstk_Director2Member_6" order="1002" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
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